seal.watch / uk

United Kingdom · 2000—2026

Grey and harbour seals

Seals around the United Kingdom.

Follow public seal observations from the United Kingdom. Browse published records, explore the places and stories behind them, or share an encounter with the Seal Watch team.

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Total reports
764
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Public records archive

11 January—30 September

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Markers represent named areas, never exact sighting positions. Circle size reflects report counts; numbers match the area list. Select an area to filter the archive.

241 of 242 reports mapped · 3 areas

N ↑London · 234 reports1Dorset, England · 6 reports2Exeter · 1 report3

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Mapped areas North to south

  1. London234 reports
  2. Dorset, England6 reports
  3. Exeter1 report

Areas without one map point

Broad country and coast labels, and places without a reviewed reference, remain filterable here.

Map: Natural Earth.

Reports over time

All dates

Select a year, then a month. Counts describe published reports; one animal may appear in several reports.

  1. 22000
  2. 42001
  3. 12002
  4. 12003
  5. 32005
  6. 22006
  7. 52007
  8. 12008
  9. 32009
  10. 92010
  11. 132011
  12. 72012
  13. 152013
  14. 82014
  15. 82015
  16. 92016
  17. 282017
  18. 212018
  19. 142019
  20. 212020
  21. 182021
  22. 152022
  23. 362023
  24. 302024
  25. 2482025
  26. 2422026

Months in 2026

  1. 9Jan
  2. 15Feb
  3. 52Mar
  4. 35Apr
  5. 26May
  6. 41Jun
  7. 24Jul
  8. 24Aug
  9. 16Sep
  10. 0Oct
  11. 0Nov
  12. 0Dec

Grouped by each record’s archive date. Approximate dates keep their original labels in the records below.

  1. 2026
    River exe weir Exeter
    Unidentified Visitor report to Seal Watch

    1 seal observed at 09:57 (UK time). Fish in mouth. Swimming around by the weir. Seems a long way up from the exe mouth, but maybe they come up for the salmon ladder Grey seal · 1 seal

  2. Holyhead, Anglesey Anglesey, Wales
    Unidentified jardinjungle — iNaturalist observation 403605037

    A seal was photographed swimming in the water; iNaturalist identifies it as a grey seal. Grey seal

  3. HMS Belfast London
    Unidentified ZSL Thames Marine Mammal Survey, report 5829 — https://sites.zsl.org/inthethames/main/

    Observer description: Observer submitted photographs; no written description of the animal was provided.

  4. Under Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5828 — https://sites.zsl.org/inthethames/main/

    Observer description: Flat muzzle, dark shiny head.

  5. Thames dock boat London
    Unidentified ZSL Thames Marine Mammal Survey, report 5827 — https://sites.zsl.org/inthethames/main/

    Observer description: Muzzle, rolled on its side

  6. Creekmouth Open Space Barking, near the small Thames Barrier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5826 — https://sites.zsl.org/inthethames/main/

    Observer description: Long dog like snout. Dark brown colour. Head came above water before taking a deep breath and diving back down. Saw small amount of body whilst diving seemed quite large & in good condition

  7. In between the Harrods Depository building and Craven Cottage. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5825 — https://sites.zsl.org/inthethames/main/

    Observer description: The head coming off the water. At some point, cleary eating some fish as seaguls flied around.

  8. I saw it in the middle of the river London
    Unidentified ZSL Thames Marine Mammal Survey, report 5822 — https://sites.zsl.org/inthethames/main/

    Observer description: It looked just like a normal seal. Observer notes: So it peeked its head above the water, near my sailing boat, before returning under the river. I later saw a seal, possibly a different one, swimming away.

  9. Just south of Canary Wharf pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5820 — https://sites.zsl.org/inthethames/main/

    Observer description: Head, and back as it dived and resurfaced several times

  10. Near Kew Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5821 — https://sites.zsl.org/inthethames/main/

    Observer description: Popped his head up right before kew bridge struggling with a large fish it had caught spent. It slowly drifted down stream with the tide as it tried to get the fish down.

  11. Between Tower Bridge and London Bridge - probably closer to London Bridge than Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5818 — https://sites.zsl.org/inthethames/main/

    Observer description: Large grey seal swimming and coming back up looking around and diving back down Observer notes: Looked a hapoy playful seal between Tower Bridge and London Bridge - was swimming around and bobbing about

  12. Middle of river by the side of Olivers Island, bobbing up and down. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5817 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey seal swimming on surface bobbing up and down, went under shortly after and lost sight.

  13. By Richard III moored ship next to Blackfriars. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5819 — https://sites.zsl.org/inthethames/main/

    Observer description: Medium to small size gray/brown shiny marine mammal popping up and disappearing for 5-10 minutes before surfacing again with snout out of water and back barely visible. Grey seal

  14. In the Thames in front of the OXO tower London
    Unidentified ZSL Thames Marine Mammal Survey, report 5815 — https://sites.zsl.org/inthethames/main/

    Observer description: Mottled grey. Breaching the surface, travelling towards Waterloo bridge. Floating near the surface but would bop under the water occasionally. Quite large- definitely adult

  15. Near the National Theatre London
    Unidentified ZSL Thames Marine Mammal Survey, report 5816 — https://sites.zsl.org/inthethames/main/

    Observer description: Its head appeared above the surface of the water twice for a few moments

  16. He popped his head up and was bobbing in the water for a little bit and then went back under the water. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5814 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw his head and his back when he dove under the water. He had spots on his back and was sooo cute!

  17. By St Marys Church (Clapham Riverside) London
    Unidentified ZSL Thames Marine Mammal Survey, report 5813 — https://sites.zsl.org/inthethames/main/

    Observer description: Head with short whiskered muzzle. Spotty back. Probably 1.5m long.

  18. Middle of the Thames near Millbank tower and just up from the Tamesis Dock boat pub. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5811 — https://sites.zsl.org/inthethames/main/

    Observer description: I think it was a grey seal based on the silhouette of the head (I thought it was a dog in the water at first). It popped its head up from the water, looked around and then popped back into the water. I waited about 5 - 10 minutes for it to pop back up when I saw its head and body surface briefly by the Tamesis Dock boat pub. I could then see its body swim towards Lambeth bridge and disappear under the water again.

  19. In Thames, downstream from Westminsters bridge by county hall. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5810 — https://sites.zsl.org/inthethames/main/

    Observer description: See photo

  20. By tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5808 — https://sites.zsl.org/inthethames/main/

    Observer description: Heads popping up oit if water and backs as diving down

  21. Close to rivers edge. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5809 — https://sites.zsl.org/inthethames/main/

    Observer description: Head emerged from surface. Dan said it was a stick.

  22. Between Battersea bridge and Albert Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5806 — https://sites.zsl.org/inthethames/main/

    Observer description: Shape of head and muzzle. The seal was eating a large fish that it had caught. The fish was about 2.5 feet long.

  23. Waterloo Bridge, swimming on the Upstream side of the bridge heading downstream, on the South Bank side of the river. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5805 — https://sites.zsl.org/inthethames/main/

    Observer description: Partly submerged, roughly 2m plus in length, light grey colour. Definitely a seal, but didn’t get a good look at its head.

  24. Greenwich Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5804 — https://sites.zsl.org/inthethames/main/

    Observer description: None. It was in the water.

  25. Near Hammersmith bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5803 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey Seal

  26. North side opposite Nine Elms just along from Battersea Power Station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5802 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw muzzle breaking the water for a shirt while and then diving.

  27. In the water 50m east of Putney Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5801 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal seen basking on the surface of the river on its back before rolling over, looking around and then diving underwater with its back out of the water

  28. Hammersmith bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5800 — https://sites.zsl.org/inthethames/main/

    Observer description: Head poking from the water and looking around

  29. Black friars bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5799 — https://sites.zsl.org/inthethames/main/

    Observer description: Its head popping up and then swimming under…

  30. Under Charing Cross bridge at the cocktail bar on the bank London
    Unidentified ZSL Thames Marine Mammal Survey, report 5797 — https://sites.zsl.org/inthethames/main/

    Observer description: Head and body. It dove down

  31. In the river by Tate Modern London
    Unidentified ZSL Thames Marine Mammal Survey, report 5795 — https://sites.zsl.org/inthethames/main/

    Observer description: Swimming on back, so saw underside and face, then the seal dived and we didn’t see it surface

  32. Mid way between greenwich pier and canary Wharf London
    Unidentified ZSL Thames Marine Mammal Survey, report 5812 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw it lying full length and initially thought it was a small tree trunk but then it turned and dove under the water as we approached. Its tail was last to dissappear. I spoke to the river guide about it and he said he has seen it too and sightings were quite common. Observer notes: Very happy to see the seal!

  33. Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5793 — https://sites.zsl.org/inthethames/main/

    Observer description: The head coming out of the water Observer notes: We are happy!

  34. By the tate modern Blackfriars bridge opposite st pauls cathedral London
    Unidentified ZSL Thames Marine Mammal Survey, report 5794 — https://sites.zsl.org/inthethames/main/

    Observer description: I was sat on the steps when a seal came out of the water towards me in the night. It was so unexpected that I squealed “OMG its a seal” i regret that so much as it startled the darling creature and it quickly turned around and swam off with its beautiful head out the water sort of panting from its nose. Observer notes: It was Night time so not sunny more crescent moonlit warm night. Will the seal be ok? Sadly my phone had died. It was so unexpected i had absolutely no idea we had seals in the themes

  35. Seen from near Canary Wharf Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5792 — https://sites.zsl.org/inthethames/main/

    Observer description: Long body and head at the waters surface. Looked around for a few seconds, then dived. Popped up again a few minutes later further upstream.

  36. Walking across the bridge around 9 am facing the Eye. She was swimming towords the bridge. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5807 — https://sites.zsl.org/inthethames/main/

    Observer description: I just saw her head pop up for about a minute. Then I saw her body so up right before she took a dive.

  37. From the south bank of the thames, as it came under Battersea Bridge, and contuied swimming with the flood tide up towards Chelsea Railway Bridge. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5790 — https://sites.zsl.org/inthethames/main/

    Observer description: Look to be a bigger seal. Just saw the head, bobbing up and down, and realsied that it wasnt a log. We double checked with the bonoculers to make sure.

  38. Next to the london eye London
    Unidentified ZSL Thames Marine Mammal Survey, report 5788 — https://sites.zsl.org/inthethames/main/

    Observer description: Small head and spotted body as it dove down, did not see it reappear

  39. Just opposite Wandsworth Chelsea & Fulham SCC located on Putney embankment London
    Unidentified ZSL Thames Marine Mammal Survey, report 5789 — https://sites.zsl.org/inthethames/main/

    Observer description: Could not make out any distinguishing features as we were around 45m away, just saw him pop up very briefly. Observer notes: Just found this site, I operate as staff out of SCC so will report any future sightings (will often be on a Sunday if I do see any)

  40. Neat Richmond local and wear London
    Unidentified ZSL Thames Marine Mammal Survey, report 5787 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw its head bobbing on the surface and it dive a few times Saw its body and tail as it dove

  41. In the section of water alongside the London Eye London
    Unidentified ZSL Thames Marine Mammal Survey, report 5783 — https://sites.zsl.org/inthethames/main/

    Observer description: As per the videos. It would poke its head above water for 10-20 seconds then gracefully dive down. Observer notes: It spent the whole time going first upstream then downstream and then upstream between Westminster bridge and Charing Cross bridge. We were spending the afternoon on Tattershall Castle so best ever sight to watch with a few glasses of wine! Was still there when we left.

  42. Slowly making its way up to tower bridge from around the arts ark boats. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5784 — https://sites.zsl.org/inthethames/main/

    Observer description: About every 10 minutes we saw the head for a few minutes before the seal dove and we saw its back. Every time it came up it would be moving closer to tower bridge. Head was grey-seal shaped, back was dark with some light markings.

  43. Westminster Bridge, looking at the London Eye, closer to London eye side London
    Unidentified ZSL Thames Marine Mammal Survey, report 5782 — https://sites.zsl.org/inthethames/main/

    Observer description: Gray, spotted seal, small to medium size, I saw the muzzle, head and some of the body when it was coming for air.

  44. 25.07 15:08 for about 20 mins Viewed from Bermondsey Beach London
    Unidentified ZSL Thames Marine Mammal Survey, report 5780 — https://sites.zsl.org/inthethames/main/

    Observer description: I poked its head out of the water, swam a bit against the tide, and dived under - I saw its back - and disappeared. It did that 3 or 4 times.

  45. On the south facing mud bank approximately 500 meter east from the 2 tree slipway London
    Unidentified ZSL Thames Marine Mammal Survey, report 5781 — https://sites.zsl.org/inthethames/main/

    Observer description: The large dark coloured seal had red possible blood around its neck area Observer notes: I regularly see these animals

  46. Surfacing from the river in this location - between Southwark bridge and the adjacent railway bridge (Cannon Street?) London
    Unidentified ZSL Thames Marine Mammal Survey, report 5778 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the back of a seal as it breached the water. So I saw the entire back come out of the water and go back in. Unfortunately I didn’t see the face so couldn’t get an identification based on the muzzle/snout. It was without question a seal.

  47. Gravesend prom. it was in the water London
    Unidentified ZSL Thames Marine Mammal Survey, report 5776 — https://sites.zsl.org/inthethames/main/

    Observer description: only its head. close enough i could hear it breathing. it went back under and came back up about 20ft further along.

  48. Close to Blackfriars station, London London
    Unidentified ZSL Thames Marine Mammal Survey, report 5785 — https://sites.zsl.org/inthethames/main/

    Observer description: Face and body

  49. The Seal swam under Barnes Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5775 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal face above water, then dived under when it got level with the bridge

  50. West of tower bridge about one third of the way between tower bridge and HMS Belfast and closer to the South Bank London
    Unidentified ZSL Thames Marine Mammal Survey, report 5777 — https://sites.zsl.org/inthethames/main/

    Observer description: Dark head sticking out of the water, initially thought to be a buoy though after watching for longer and seeing it move could identify the head shape, very dark and more angular head so concluded was grey seal, unable to see full body shape as Thames was very brown

  51. In front of The Oystercatcher pub. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5773 — https://sites.zsl.org/inthethames/main/

    Observer description: Head well out of water. Blowing air from nose. Long roman nose, big head.

  52. We saw the seal right by the globe theatre London
    Unidentified ZSL Thames Marine Mammal Survey, report 5779 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw the head bobbing along the surface. Black with white spots on the body which we saw diving under

  53. While on the Uber Thames Boat inbetween tower and london brudge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5774 — https://sites.zsl.org/inthethames/main/

    Observer description: We saw its head floating as it was swimming along the water went under then came back up before diving down

  54. Midstream right in front of the London Eye, swimming downstream London
    Unidentified ZSL Thames Marine Mammal Survey, report 5769 — https://sites.zsl.org/inthethames/main/

    Observer description: Swimming downstream, mid river, swam along surface and bobbed up and down breathing a dozen times times and then dived and we lost sight

  55. Embankment, swimming downstream London
    Unidentified ZSL Thames Marine Mammal Survey, report 5771 — https://sites.zsl.org/inthethames/main/

    Observer description: Large, dark seal, it came up to surface and I was the whole of it as it “arched” up. Head, fins, back and tail Observer notes: It was a brilliant moment!

  56. In the Thames opposite Battersea park London
    Unidentified ZSL Thames Marine Mammal Survey, report 5768 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal, large, long muzzle

  57. Right next to the RNLI Tower Lifeboat Station, next to Waterloo Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5770 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw a large seal that had spots on it and a very long face. It was very dark and floating in the water, then turned so we could see its face, before diving under the water. Observer notes: We’d loved seeing it! :)

  58. We were sitting at Erith Pier and we kept on seeing the nose of a seal - in and out. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5766 — https://sites.zsl.org/inthethames/main/

    Observer description: We saw a nose appearing and disappearing. We observed for an hour.

  59. Just SW of Tamesis Dock. Roughly equidistant between Lambeth Bridge and Vauxhall Bridge. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5767 — https://sites.zsl.org/inthethames/main/

    Observer description: Head and back. Nostrils above water and whiskers were clear to see. Black eyes. Smooth head. Back was slate grey and smooth. Observer notes: I was surprised to see it at first. I saw it for less than a minute. It was facing north just above the surface of the water. I assume it was breathing air in before diving down again.

  60. In the Thames, between The Wharf and Thurrock Yacht Club London
    Unidentified ZSL Thames Marine Mammal Survey, report 5765 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the head poking above the water

  61. Waterloo railway Bridge foot bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5764 — https://sites.zsl.org/inthethames/main/

    Observer description: View from above seal swimming upstream at the surface Observer notes: Took video of seal swimming it was in the middle of the river I was on the footbridge above looking down

  62. Near millennium crossing London
    Unidentified ZSL Thames Marine Mammal Survey, report 5762 — https://sites.zsl.org/inthethames/main/

    Observer description: Head, muzzle, back

  63. Near the embankment pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5763 — https://sites.zsl.org/inthethames/main/

    Observer description: Looked back swim on surface then dived down

  64. By embankment bridge / pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5761 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal breached the water to come up for air and was looking around for a bit before submerging and popping up again a few seconds later before diving back down

  65. Opposite Oxo Towewr London
    Unidentified ZSL Thames Marine Mammal Survey, report 5749 — https://sites.zsl.org/inthethames/main/

    Observer description: Head and upper chest area

  66. South Bank, near the National Theatre and Blackfriars London
    Unidentified ZSL Thames Marine Mammal Survey, report 5748 — https://sites.zsl.org/inthethames/main/

    Observer description: Their backs/bodies and tops of heads swimming along, coming up at regular intervals to breathe Original location description: I saw at least 2 seals walking along South Bank this morning, one near National Theatre and the other (assuming it was a different one) along by Blackfriars. I dont know what kind of seal

  67. Between Blackfriars & Millennium Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5747 — https://sites.zsl.org/inthethames/main/

    Observer description: Solitary seal swimming upstream against current (approaching low water) Leisurely pace. More often submerged than surfaced. Too far to ascertain type. Very dark (black) in colour. Observer notes: Poor quality pic, but back can be seen close to shore. Occasional surfacing, suggesting hunting behaviour?

  68. It was right next to the newly built section of the tideway tunnel. Saw it while walking the newly built area. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5742 — https://sites.zsl.org/inthethames/main/

    Observer description: It was dark grey, and swimming towards canary wharf direction Observer notes: Awesome

  69. Mid-river, just downstream of butlers whatf London
    Unidentified ZSL Thames Marine Mammal Survey, report 5745 — https://sites.zsl.org/inthethames/main/

    Observer description: The animals back Observer notes: Seal broke the surface only briefly whilst swimming. Clear view from deck of boat. Didnt see head or tail though.

  70. Under putney bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5746 — https://sites.zsl.org/inthethames/main/

    Observer description: It had a smooth dark grey head and was swimming

  71. Goodrington South Sands beach, near the car park and Inn on the Quay London
    Unidentified ZSL Thames Marine Mammal Survey, report 5744 — https://sites.zsl.org/inthethames/main/

    Observer reported a light grey seal with lighter markings on its head, seen close to shore at sunset. Only the head was visible; nostril shape, muzzle shape and size were uncertain. The animal surfaced repeatedly, exhaled audibly, submerged and was seen again from the beach about 5–10 minutes later. Original location description: Goodrington South sands beach in the water straight in front of the beach section closest to the car park, next to the dog friendly section and the Brewers Fayre Inn on the quay

  72. Dartford bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5740 — https://sites.zsl.org/inthethames/main/

    Observer description: Muzzle

  73. right after Fulham stadium London
    Unidentified ZSL Thames Marine Mammal Survey, report 5741 — https://sites.zsl.org/inthethames/main/

    Observer description: From a distance looked like a dog was swimming, but as we reached closer it was a playful seal diving for fish. No fins, just saw head and body as it was diving

  74. Next to Southbank Centre London
    Unidentified ZSL Thames Marine Mammal Survey, report 5737 — https://sites.zsl.org/inthethames/main/

    Observer description: Long face. Grey in colour. Kept popping its head up every 15 minutes and then disappearing under the water again.

  75. In the middle of the river, next to Limehouse London
    Unidentified ZSL Thames Marine Mammal Survey, report 5739 — https://sites.zsl.org/inthethames/main/

    Observer description: The beak with a fish in its mouth Observer notes: Uber botas drive very fast around that area and pose a threat to these animals

  76. Saw the seal lying on the beach at low tide by Cheyne pier houseboats.. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5735 — https://sites.zsl.org/inthethames/main/

    Observer description: Moving around on the shore before being aware of me on the houseboat only a couple of meters away. Could hear loud breathing/snuffling from the seal.

  77. On the north side beach about 250 yards west of Battersea Bridge. Grey with black markings. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5732 — https://sites.zsl.org/inthethames/main/

    Observer description: Roman nose, light grey, white neck and black markings.

  78. In the middle of the Thames. Near Southwark Bridge in Central London. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5734 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey head Observer notes: I just saw it very briefly. I didnt expect to see a seal in the river!

  79. In the Thames, off the pier at Cremore Gardens. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5733 — https://sites.zsl.org/inthethames/main/

    Observer description: Unsure of the specific type of seal, but it stuck its about out of the water.

  80. Location described in observation notes London
    Unidentified ZSL Thames Marine Mammal Survey, report 5731 — https://sites.zsl.org/inthethames/main/

    Observer description: Kept putting its head up qucikly and diving, thought it could be a porpoise fin at first sighting. Surfaced like that about 7 times between first sighting and the bridge. Observer notes: The tide was going out and it was a pleasant evening. I noted to a ouple walking by that there was a seal and it should pop up just over there probably about its 5th surface. And it did and we were cheerful. Tide was going out, and it did some swirls just below the surface shortly after the pier. Original location description: First spotted at marker. Then every 10yrds or so put its head up above the surface followed along embankment to Vauxhall Bridge where it swam under the first arch

  81. In Thames by Chelsea Harbour London
    Unidentified ZSL Thames Marine Mammal Survey, report 5750 — https://sites.zsl.org/inthethames/main/

    Observer description: Big muzzle swimming around for ten mins then headed downstream

  82. Crossing Battersea Bridge, a light bellied seal went to the shore to sunbathe. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5730 — https://sites.zsl.org/inthethames/main/

    Observer description: Light coloured belly

  83. By woolwich arsenal pier, bobbing around in the water as the uber boat arrived. A real treat on my birthday! London
    Unidentified ZSL Thames Marine Mammal Survey, report 5736 — https://sites.zsl.org/inthethames/main/

    Observer description: Dark grey smooth rounded head, big eyes, dark grey body

  84. very close to southwark bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5729 — https://sites.zsl.org/inthethames/main/

    Observer description: just head above water then dived down to remerge further up stream towards millennium bridge

  85. Under the millennium bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5727 — https://sites.zsl.org/inthethames/main/

    Observer description: It was bobbing up and down in the water looking around and had a spotty grey face/neck, after a few minutes it dived and we didn’t spot where it came up Observer notes: He was bobbing watching the folks on the bridge. So a cross between swinmming and interacting really. We didn’t see which way he was going as despite looking for ages, when he dived we didn’t see him again

  86. Swimming eastwards towards Waterloo Bridge, adjacent to the Southbank Skate Space London
    Unidentified ZSL Thames Marine Mammal Survey, report 5726 — https://sites.zsl.org/inthethames/main/

    Observer description: Blackish-grey, appeared to be male. Head popped up twice before it disappeared underneath the water again.

  87. Before Blackfriars bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5728 — https://sites.zsl.org/inthethames/main/

    Observer description: whole body, popping it’s head up then it’s body and flippers going up and back down as it swam east. Observer notes: Seal popping it’s head up and going back under repeatedly as we walked along the river, popped up two more times and last saw it under Blackfriars bridge.

  88. Below Hammersmith bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5725 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the full body of the seal as he makes surface juste below the bridge and swap with the current in the direction of Putney bridge

  89. Princes stairs, and near Angel pub London
    Unidentified ZSL Thames Marine Mammal Survey, report 5724 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw head peaking out, then a bit of neck and back as it was diving. Repeat multiple times in slightly different spots around same area

  90. Putney rail bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5723 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw face above water and then it dived down into water. Clear view from bridge

  91. By the banks on the south side just after the bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5722 — https://sites.zsl.org/inthethames/main/

    Observer description: Full animal, moving it’s head every now and then

  92. Crossness pumping station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5721 — https://sites.zsl.org/inthethames/main/

    Observer description: Blackish grey in colour Muzzle pointing out of the water Smooth and dark back arched as the seal dived

  93. Just after going under Tower Bridge towards Greenwich on the Thames Clipper London
    Unidentified ZSL Thames Marine Mammal Survey, report 5738 — https://sites.zsl.org/inthethames/main/

    Observer description: The animal looked just like the seals in cornwall. It was bobbing up and down and then swam and dived away.

  94. Just west of Tower Bridge, near the middle of the Thames. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5720 — https://sites.zsl.org/inthethames/main/

    Observer description: White line on the side of its head. Long muzzle.

  95. Spotted from the Uber boat next to the uber boat pier under Waterloo Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5718 — https://sites.zsl.org/inthethames/main/

    Observer description: The seal was swimming with its head above the water before flicking its tail up and swimming away as the boat we were on started to move Observer notes: Saw a tiktok about this website a year ago so have kept my eye out since

  96. Temple boat London
    Unidentified ZSL Thames Marine Mammal Survey, report 5719 — https://sites.zsl.org/inthethames/main/

    Observer description: Swimming

  97. Royal festival hall London
    Unidentified ZSL Thames Marine Mammal Survey, report 5716 — https://sites.zsl.org/inthethames/main/

    Observer description: Head swimming in west direction

  98. In the Thames with a fish in his/her mouth London
    Unidentified ZSL Thames Marine Mammal Survey, report 5715 — https://sites.zsl.org/inthethames/main/

    Observer description: Going in and out of the water with a fish in his/her mouth. Seagulls were following but he/she was able to escape. Kept going until the Uber boat stop in Canary Wharf and then I lost track of

  99. Under the Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5717 — https://sites.zsl.org/inthethames/main/

    Observer description: We stood on the Tower Bridge and saw the seal directly. The seals head was over the surface for about 30 seconds. The seals head was dark-brown with a longer snout (like a grey seal?). Maybe it was there to take a short breath and it looked around. After that the seal submerged and swam away.

  100. Near the Uber Boat dock London
    Unidentified ZSL Thames Marine Mammal Survey, report 5714 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the seal pop its head above the water twice. Unsure which species though as I was on Southwark bridge and couldn’t make it out

  101. By Wandsworth Bridge in the middle of the river London
    Unidentified ZSL Thames Marine Mammal Survey, report 5712 — https://sites.zsl.org/inthethames/main/

    Observer description: It was almost black so looked more like a sea lion as a slimmer muzzle. I thought just something floating, then its head pooped up and it was looking round at some canoeists and then dived under.

  102. Next to the golden jubilee boat London
    Unidentified ZSL Thames Marine Mammal Survey, report 5713 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey seal’s head bobbing about in the water going in and out the water

  103. At the end of the Chelsea Houseboats, near Cremourne Gardens. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5710 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey muzzle above the water.

  104. near Silverfleet docks London
    Unidentified ZSL Thames Marine Mammal Survey, report 5711 — https://sites.zsl.org/inthethames/main/

    Observer description: head and back. Diving twice moving down river

  105. dead seal in greenhithe London
    Unidentified ZSL Thames Marine Mammal Survey, report 5707 — https://sites.zsl.org/inthethames/main/

    Observer description: Dead seal with a missing head

  106. Putney Bridge tube bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5706 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal head bobbing up and down heading down stream with tide Observer notes: Seal bobbing up and down heading down river with tide

  107. In the water off the shore at Dukes Meadow in Chiswick London
    Unidentified ZSL Thames Marine Mammal Survey, report 5709 — https://sites.zsl.org/inthethames/main/

    Observer description: Head emerging from water and looking around. Seal then dived under, exposing its back above the surface. Seal reappeared 15 mins later and looked around

  108. At the Hurlingham Yacht Club pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5705 — https://sites.zsl.org/inthethames/main/

    Observer description: Full seal crawling out of the water, no specific recognisable features

  109. In the Thames at Crossness, between the river wall and the pier at Cory’s Riverside 2 facility London
    Unidentified ZSL Thames Marine Mammal Survey, report 5704 — https://sites.zsl.org/inthethames/main/

    Observer description: Head only, popping up three times as it swam downriver: rounded head with forward-facing eyes, nostrils on front of muzzle rather than top, no “Roman nose” as on Grey Seal

  110. In Thames opposite the lands of Syon House. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5703 — https://sites.zsl.org/inthethames/main/

    Observer description: Muzzle and head above water for long period of time. Animal was rotating its head from side to side on a regular basis.

  111. Along the river near Sir John McDougall Gardens on the isle of dogs. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5702 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw its head. I kept looking as I wasnt sure but it kept disappearing and reappearing. I stopped and took a closer look and realised it was a seal. As I went under I got the chance to see more of its body and the spotted markings. After 3 or 4 times of going under and quickly back up, it went under and I didnt see it resurface. My son didnt want to hang around for too long. Im 100% certain it was a seal and fairly sure it was a great seal.

  112. on the beach, waters edge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5701 — https://sites.zsl.org/inthethames/main/

    Observer description: seal was splashing in water then came out onto beach in sun. it was bothered by gulls and ducks. went in and out a few times Observer notes: dont think the animal was int any trouble. seemed fine

  113. Just before the the ferry. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5700 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw the head lift up above the water, swimming along the Thames side before diving. Dark grey

  114. By Cuckolds point on the exposed beach, round the corner from the A&O hostel. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5699 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey mottled

  115. Middle of the river near Gallions Point Wildlife Beach London
    Unidentified ZSL Thames Marine Mammal Survey, report 5698 — https://sites.zsl.org/inthethames/main/

    Observer description: just the head above water, followed by arch of back as it returned underwater Original location description: One marine mammal (seal?) spotted surfacing every few minutes in the middle of the river. Possibly another basking on Gallions Point Wildlife Beach, but hard to tell from south bank

  116. In the Thames near the entrance to Chelsea Harbour London
    Unidentified ZSL Thames Marine Mammal Survey, report 5697 — https://sites.zsl.org/inthethames/main/

    Observer description: A large body with a spotted head, floating on top of the water before diving down.

  117. Millbank Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5695 — https://sites.zsl.org/inthethames/main/

    Observer description: Matched description of grey seal

  118. In front of Crossness pumping station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5696 — https://sites.zsl.org/inthethames/main/

    Observer description: Round head with a distinct snout, brownish. Observer notes: Looked to be going on short foraging/scoping dives

  119. Near the shore/bank of Thames barrier park London
    Unidentified ZSL Thames Marine Mammal Survey, report 5693 — https://sites.zsl.org/inthethames/main/

    Observer description: Spotted dark grey colour Observer notes: Not sure if stranded or just chilling in the water bank

  120. Thames Barrier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5694 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey coloured. Not using left fin. Tail looked injured.

  121. Opposite the World’s End Estate London
    Unidentified ZSL Thames Marine Mammal Survey, report 5692 — https://sites.zsl.org/inthethames/main/

    Observer description: It was facing downstream as the tide was receding and floating with the tide. It turned its head and then went under the water.

  122. Chiswick Mall near RNLI lifeboat station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5691 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw 3 times in 10 mins popped up and disappeared then reappeared

  123. Northern bank of River Alde, Aldeburgh (W3W ref: ///negotiators.liberty.rehearsal) London
    Unidentified ZSL Thames Marine Mammal Survey, report 5690 — https://sites.zsl.org/inthethames/main/

    Observer description: Large dead seal floating at edge of river. Appeared to be upside down.

  124. Bishops park fulham London
    Unidentified ZSL Thames Marine Mammal Survey, report 5689 — https://sites.zsl.org/inthethames/main/

    Observer description: I sew the seal come up from the water in the river at Bishops park it came up a few times followed it down the river for around 10 minutes until I had to turn around and go back to work

  125. Snettisham beach toward Hunstanton London
    Unidentified ZSL Thames Marine Mammal Survey, report 5688 — https://sites.zsl.org/inthethames/main/

    Observer description: Sadly it was dead about 30 m from The water

  126. Rotherhithe pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5687 — https://sites.zsl.org/inthethames/main/

    Observer description: Copper colored

  127. Seal, swimming past greener cutty Sark up to Canada Water direction London
    Unidentified ZSL Thames Marine Mammal Survey, report 5686 — https://sites.zsl.org/inthethames/main/

    Observer description: It was swimming around going up the river..dark grey with dark nose..i saw its head

  128. Just past Chiswick Pier heading downstream London
    Unidentified ZSL Thames Marine Mammal Survey, report 5683 — https://sites.zsl.org/inthethames/main/

    Observer description: Head multiple times surfacing and diving with large fish in its mouth. Observer notes: It was feeding on a large fish.It surfaced and dived mulyiple times and I watched all the way to Chiswick Ayot It seemed like a very large seal.

  129. Near Chiswick pier up to the Eyot London
    Unidentified ZSL Thames Marine Mammal Survey, report 5685 — https://sites.zsl.org/inthethames/main/

    Observer description: Definitively rounded head..grey seal . Large. Observer notes: I reported this yesterday and must have hit the wrong button asit came up on your report as a harbour seal. The grey seal must have just caught the fish and kept surfacing with it in its mouth.

  130. In the river near the London apprentice public house isleworth. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5684 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal with a bigger muzzle Observer notes: I have taken screenshots from the video please let me know if you want the video and I will share it with you

  131. Close to HMS Belfast London
    Unidentified ZSL Thames Marine Mammal Survey, report 5682 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal for sure

  132. The long sandbank between Pageant Steps and A&O Hostel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5680 — https://sites.zsl.org/inthethames/main/

    Observer description: About a meter long. Red brownish rust colour. Sunbathing on the sandbank

  133. Westminster Bridge, swimming upstream London
    Unidentified ZSL Thames Marine Mammal Survey, report 5681 — https://sites.zsl.org/inthethames/main/

    Observer description: Relaxed, swimming upstream, surfacing and looking around

  134. Rotherhithe Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5678 — https://sites.zsl.org/inthethames/main/

    Observer description: Orangey belly. Reddish neck.

  135. Thames path behind Wapping station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5677 — https://sites.zsl.org/inthethames/main/

    Observer description: Almost a leopard print pattern. Maybe 1.6m length. Seal was just laying on the beach of the Thames, occasionally shuffling

  136. Under Hungerford Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5675 — https://sites.zsl.org/inthethames/main/

    Observer description: Spotted bottom as it dived.

  137. Chilling on the beach by the AO Hostel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5676 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey with ginger fur, maybe about a meter long. Sleeping in the sun and sometimes shuffling around on the sand and occasionally changing position.

  138. On the beach nearby London
    Unidentified ZSL Thames Marine Mammal Survey, report 5674 — https://sites.zsl.org/inthethames/main/

    Observer description: Chilling on the sand. I think they are alright but hard to tell

  139. Canary wharf pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5672 — https://sites.zsl.org/inthethames/main/

    Observer description: Head and body, dark in colour Observer notes: Great to see, the Thames is thriving

  140. Between Barnes Bridge and the White Hart pub London
    Unidentified ZSL Thames Marine Mammal Survey, report 5673 — https://sites.zsl.org/inthethames/main/

    Observer description: Brown and tan colouring

  141. Mendip Wharf, close to wandsworth bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5679 — https://sites.zsl.org/inthethames/main/

    Observer description: head (see pictures)

  142. Crossing under Chiswick Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5667 — https://sites.zsl.org/inthethames/main/

    Observer description: We were on the bridge and a seal popped out of the water with a big fish in its mouth. It was getting carried away by the tide towards central London. It’s head kept going in and out of the water, maybe trying to eat the fish.

  143. On a small beach outside Columbia Wharf London
    Unidentified ZSL Thames Marine Mammal Survey, report 5668 — https://sites.zsl.org/inthethames/main/

    Observer description: Reddish to dark brown fur with some dark spots on the sides

  144. The River Thames; Southbank, near 253 Rotherhithe Street London
    Unidentified ZSL Thames Marine Mammal Survey, report 5669 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw a happy grey seal, including its dorsal surface and the head. Such a beautiful being. Observer notes: It was such an enjoyable experience to see the seal swimming near my home. It was a highlight of my day. I named her Gloria. At first, I thought it was a large piece of wood, but then I realised it was a seal. She seemed calm. Can you please confirm the seal is a grey seal as I may be wrong. Thank you

  145. Orient Wharf, Wapping London
    Unidentified ZSL Thames Marine Mammal Survey, report 5666 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the full body and head. It was quite large ( there was a childs large red rubber kick ball nearby and the seals head was similar in size. Observer notes: The seal hung out just floating about for quite a long time.

  146. On a walk from Richmond to Kew, on the Thames path just past Syon house. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5663 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw a seal diving into the water coming back up moments later with a fish! Dark seal with what seemed lots of wide marking and short whiskers.

  147. On the large sandbank. Opposite side of the river to Canary Wharf. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5664 — https://sites.zsl.org/inthethames/main/

    Observer description: Whole seal sunbathing and then moving up the sandbank.

  148. On the foreshore in rotherhithe by Pageant Crescent London
    Unidentified ZSL Thames Marine Mammal Survey, report 5662 — https://sites.zsl.org/inthethames/main/

    Observer description: Golden brown belly, darker brown on the top leading to a grey brown towards the tail Observer notes: Ive watched the seal for about 20 minutes, the ride is on its way in and on two occasions as the water has got a bit nearer the seal has turned away from the water and moved circa 8 meters. It has then rested in the sun again, occasionally rubbing its head. It is lying with its head away from the sun. I have a video of it moving away from the water.

  149. By the slipway to Shadwell Basin London
    Unidentified ZSL Thames Marine Mammal Survey, report 5661 — https://sites.zsl.org/inthethames/main/

    Observer description: Juveline seal, appeared fairly dark skin Observer notes: Juvenile Seal started following our kayaks a couple hundred metres downstream then popped up as we were heading to land at shadwell basin, kept popping up next to our kayaks to investigate us as we landed on the slipway.

  150. By tower bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5659 — https://sites.zsl.org/inthethames/main/

    Observer description: Dark brown

  151. Between the London eye and the golden jubilee bridges London
    Unidentified ZSL Thames Marine Mammal Survey, report 5658 — https://sites.zsl.org/inthethames/main/

    Observer description: We could see his head, and then he swam away and the disapppeared under the water Observer notes: I have a video if you would like it

  152. On the beach in front of the a&p London
    Unidentified ZSL Thames Marine Mammal Survey, report 5657 — https://sites.zsl.org/inthethames/main/

    Observer description: Mottled brown with

  153. On the beach behind the hotel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5655 — https://sites.zsl.org/inthethames/main/

    Observer description: Ginger body

  154. On the beach next to Rotherhithe Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5654 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal was lounging about on the beach at low tide sunning herself. She was orange and appeared to have almost red like marks by her flippers. Observer notes: Seal seemed very at home, relaxed and content. Didnt seem to want to get in the water and was moving away from the water as tide came in.

  155. On the small beach in front of the hotel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5652 — https://sites.zsl.org/inthethames/main/

    Observer description: Dark brown head, orange body, grey tail. Furry, possibly a pup Observer notes: Apparently the ferry people have seen this seal for 3 days straight

  156. In the river London
    Unidentified ZSL Thames Marine Mammal Survey, report 5649 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw its head!

  157. Chilling on the beach next to the pier and hostel in Rotherhithe. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5656 — https://sites.zsl.org/inthethames/main/

    Observer description: He/she had a brown-ish coat. They had a dog like face.

  158. Security Camera environment agency moorings Shepperton adj Shepperton Lock and Hamhaugh Island London
    Unidentified ZSL Thames Marine Mammal Survey, report 5653 — https://sites.zsl.org/inthethames/main/

    Observer description: Its is on the video recording a big seal

  159. By the Rotherhithe pier. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5646 — https://sites.zsl.org/inthethames/main/

    Observer description: We saw the whole animal, it was basking on the beach.

  160. Off Tilly Whim, Durlston Dorset, England
    Unidentified Durlston Country Park, Latest Sightings (2026 table) — https://www.durlston.co.uk/latest-sightings

    One Grey Seal was recorded off Tilly Whim. Grey seal · 1 seal

  161. On a small beach at low tide by the O2 arena. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5643 — https://sites.zsl.org/inthethames/main/

    Observer description: The seal appeared to be sunbathing on the beach. It raised its head a few times while I was there so appeared ok. I didnt want to bother it so didnt stay to check it returned to water when tide rose. Observer notes: I hope the seal was ok. Have never seen one here before. It did raise its head a few times and looked to be resting/sunbathing.

  162. On the beach near the tide line. The tide was low London
    Unidentified ZSL Thames Marine Mammal Survey, report 5648 — https://sites.zsl.org/inthethames/main/

    Observer description: Brown coloured seal laying in the sun. It rolled over and had a scratch while we watched it Observer notes: The photo is not the clearest but it was 100% seal who seemed happy sunbathing

  163. Near the entrance to Battersea Park, beyond the walkway from the Power Station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5647 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the head and body of the seal, it looked fairly small. Observer notes: The seal looked like it was trying to get onto land but couldnt due to the weather/waves. Original location description: Near the entrance to Battersea Park, just after walk way from Power Station. The seal was in the water and looked like it was trying to get onto the bank but couldnt due to rough waters. The seal swam further down the river towards the direction of the park from the bank.

  164. It passed under the pedestrian bridge by all the house boats London
    Unidentified ZSL Thames Marine Mammal Survey, report 5641 — https://sites.zsl.org/inthethames/main/

    Observer description: Dark spots on body, fairly small

  165. Near Free Trade Wharf London
    Unidentified ZSL Thames Marine Mammal Survey, report 5639 — https://sites.zsl.org/inthethames/main/

    Observer description: Long snout, grey spots on the side, grey belly

  166. Off Tilly Whim, Durlston Dorset, England
    Unidentified Durlston Country Park, Latest Sightings (2026 table) — https://www.durlston.co.uk/latest-sightings

    Two seals were recorded off Tilly Whim. Species not recorded · 2 seals

  167. On the beach outside AO hotel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5636 — https://sites.zsl.org/inthethames/main/

    Observer description: Dark with orange mousy fur. Lying on its side and chilling out. Looked up at us when we made noises and otherwise looked totally relaxed Observer notes: How do you know if the animal is resting or injured? Are they often spotted alone?

  168. Lying on the mudflats at low tide, a couple of metres from the water. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5637 — https://sites.zsl.org/inthethames/main/

    Observer description: Could see the whole body, as it was lying out of the water on the mud. It would frequently roll over or raise its head and/or tail. But even with binoculars it was hard for me to tell which species -- sometimes the head profile looked flat like a grey, sometimes it looked more like a harbour.

  169. Near of Royal Naval College in Greenwich London
    Unidentified ZSL Thames Marine Mammal Survey, report 5634 — https://sites.zsl.org/inthethames/main/

    Observer description: The seal was resting on the sand around 10:44 am. An hour later I was passing the same place: during the high tide the seal was resting in vertical position in water nearby (~11:40 am).

  170. Walking across Tower bridge. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5635 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey seal, saw the flippers & the head as they did some flips

  171. On the sandy shore close to the Old Naval College, Greenwich - to the right of the Thames Clipper pier. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5633 — https://sites.zsl.org/inthethames/main/

    Observer description: Small reddish brown seal

  172. Hobbit Beach, four seals playing in the waves near the shore. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5632 — https://sites.zsl.org/inthethames/main/

    Observer description: Brown seal two front fins one little back fin, big black eyes watching us!

  173. Near the Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5638 — https://sites.zsl.org/inthethames/main/

    Observer description: the whole body

  174. Right behind the a&o hotel on the sandy beach London
    Unidentified ZSL Thames Marine Mammal Survey, report 5631 — https://sites.zsl.org/inthethames/main/

    Observer description: Orange with spots, white whiskers. White bum. Absolutely stunning, just chilling on the beach belly up. Scratching his ear and stretching but mostly resting.

  175. Rotherhithe dock, AO hostel During low tide London
    Unidentified ZSL Thames Marine Mammal Survey, report 5630 — https://sites.zsl.org/inthethames/main/

    Observer description: Orange brown coloured fur A little bit spotted 1-1.5m long

  176. Cutty Sark London
    Unidentified ZSL Thames Marine Mammal Survey, report 5629 — https://sites.zsl.org/inthethames/main/

    Observer description: Brown-ish

  177. Off Tilly Whim, Durlston Dorset, England
    Unidentified Durlston Country Park, Latest Sightings (2026 table) — https://www.durlston.co.uk/latest-sightings

    One seal was recorded off Tilly Whim. Species not recorded · 1 seal

  178. Rotherhithe beach, outside the AO Hotel, next to the Rotherhithe ferry London
    Unidentified ZSL Thames Marine Mammal Survey, report 5628 — https://sites.zsl.org/inthethames/main/

    Observer description: Brown and fuzzy

  179. Beach just north of the Hilton hotel at Rotherhithe London
    Unidentified ZSL Thames Marine Mammal Survey, report 5626 — https://sites.zsl.org/inthethames/main/

    Observer description: red brown fur Original location description: 25th Mar 12:12 just north of the Hilton hotel at Rotherhithe, on the beach at low tide. Rolling around on the sand, lifting their head and tail up, seemd to be stretching and relaxing

  180. Rotherhithe, on the left side of Rotherhithe boat harbour. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5625 — https://sites.zsl.org/inthethames/main/

    Observer description: Red/brown colour with some dark spots.

  181. HEAD OUT OF THE WATER STARING TOWARD THE SEA WALL London
    Unidentified ZSL Thames Marine Mammal Survey, report 5624 — https://sites.zsl.org/inthethames/main/

    Observer description: DARK GREY HEAD, BLACK EYES, WHISKERS, LONGISH SNOUT FULL HEAD OUT OF THE WATER BEFORE DROPPING BACK UNDER.

  182. Spotted on a sandy beach near the Ship sign during low tide. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5623 — https://sites.zsl.org/inthethames/main/

    Observer description: Slightly ruddy colour and had some spots on its belly. At one point she rolled over onto her back.

  183. By the Salt Quay pub in Rotherhithe London
    Unidentified ZSL Thames Marine Mammal Survey, report 5622 — https://sites.zsl.org/inthethames/main/

    Observer description: The baby seal was on the edge of the dock, it was there before I arrived and stayed there after Id left .

  184. On the slipway London
    Unidentified ZSL Thames Marine Mammal Survey, report 5621 — https://sites.zsl.org/inthethames/main/

    Observer description: Mottled grey lounging on slipway

  185. By the Rotherhithe Canary Wharf ferry pier near a&o hotel on the sandy river bank. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5619 — https://sites.zsl.org/inthethames/main/

    Observer description: Its back was a rusty brownish colour, the rest of the seal was grey. Observer notes: The animal must have been there for a longer time when we got there, we didnt stay long. It was enjoying the sun.

  186. Near the Rotherhithe dock London
    Unidentified ZSL Thames Marine Mammal Survey, report 5620 — https://sites.zsl.org/inthethames/main/

    Observer description: It had a sand coloured coat and a reddish back

  187. At the shore of the a&o London dockland riverside London
    Unidentified ZSL Thames Marine Mammal Survey, report 5618 — https://sites.zsl.org/inthethames/main/

    Observer description: It looks healthy, but a lot of rubbish and people around also the boats

  188. Westminster Bridge in the river Thanes London
    Unidentified ZSL Thames Marine Mammal Survey, report 5617 — https://sites.zsl.org/inthethames/main/

    Observer description: Head just out of the water Observer notes: None

  189. Below the Lighthouse, Durlston Dorset, England
    Unidentified Durlston Country Park, Latest Sightings (2026 table) — https://www.durlston.co.uk/latest-sightings

    One seal was recorded below the Lighthouse. Species not recorded · 1 seal

  190. Just by London heliport London
    Unidentified ZSL Thames Marine Mammal Survey, report 5615 — https://sites.zsl.org/inthethames/main/

    Observer description: No distinguishing features by short snout hence the semi-confident assertion it was a grey seal

  191. By Greenwich pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5616 — https://sites.zsl.org/inthethames/main/

    Observer description: Orange, name marmalade

  192. Under Westminster Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5613 — https://sites.zsl.org/inthethames/main/

    Observer description: Head surfacing and bobbing

  193. Upstream of Chiswick Bridge, about 3m off the Middx bank by Quintin Rowing Club Boathouse London
    Unidentified ZSL Thames Marine Mammal Survey, report 5612 — https://sites.zsl.org/inthethames/main/

    Observer description: It popped its head above water in my wake, briefly looked around then sank back into the water

  194. Observation Point, Durlston Dorset, England
    Unidentified Durlston Country Park, Latest Sightings (2026 table) — https://www.durlston.co.uk/latest-sightings

    One seal was recorded diving, catching and tossing a flatfish. Species not recorded · 1 seal

  195. Curry sark Greenwich London
    Unidentified ZSL Thames Marine Mammal Survey, report 5611 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw the body and muzzle. Please see photograph

  196. On the corner sandy part below the benches near Bellot Memorial Greenwich (close to the Thames River Grewnwich pier). London
    Unidentified ZSL Thames Marine Mammal Survey, report 5610 — https://sites.zsl.org/inthethames/main/

    Observer description: She was lying on the sand, moving her head and opening and closing her eyes. At one point she slightly rolled onto her back. She was spotty, red coloured brick-brownish shade.

  197. on the beach, near the the ship pub London
    Unidentified ZSL Thames Marine Mammal Survey, report 5605 — https://sites.zsl.org/inthethames/main/

    Observer description: it was brown

  198. On the bank opposite Greenwich University stranded on the beach London
    Unidentified ZSL Thames Marine Mammal Survey, report 5606 — https://sites.zsl.org/inthethames/main/

    Observer description: Whole seal beached on the shore

  199. Near the jetty London
    Unidentified ZSL Thames Marine Mammal Survey, report 5609 — https://sites.zsl.org/inthethames/main/

    Observer description: Reddish colour

  200. By Greenwich Pier. To the right of the Ship restaurant and in front of the Royal Naval College London
    Unidentified ZSL Thames Marine Mammal Survey, report 5607 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal lying on the sand. Did move around on land a bit and was watching when people passed by. Appeared young (had orange fur and was on the smaller side) Observer notes: I had seen the seal there the day before also. A member of pub staff told me that a member of the public told him the seal appeared to have lost it mother and that is why it was staying in this location.

  201. By the ship pub on the bank of the thanes London
    Unidentified ZSL Thames Marine Mammal Survey, report 5608 — https://sites.zsl.org/inthethames/main/

    Observer description: Whole Seal resting on the river bank. Looks like a young seal as it looked like it was loosing it’s fur.

  202. From the rear of The Mayflower pub London
    Unidentified ZSL Thames Marine Mammal Survey, report 5614 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the full seal come up for air, roll over and dive back under

  203. Close to Cutty Sark in Greenwich, just behind The Ship pub. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5604 — https://sites.zsl.org/inthethames/main/

    Observer description: It was lying on sand in the sun, it’s fur is ginger with dark spots

  204. On the sand under the Ship sign London
    Unidentified ZSL Thames Marine Mammal Survey, report 5603 — https://sites.zsl.org/inthethames/main/

    Observer description: No

  205. It was near the Yacht pub on the beach. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5602 — https://sites.zsl.org/inthethames/main/

    Observer description: It was reddish brown and spotted on its body - looked quite young, very large eyes. It was basking on the beach for a bit and then it moved further down towards the water and continued resting there. Observer notes: My dog was right up to next to it before I spotted it as it was kind of blending into the sea, but I pulled my dog back and put him on the lead. My dog was more nervous than anything so hopefully we didnt stress the seal out too much. I looked over (from a distance) to check for any obvious signs of injury on the seal (as this is my first sighting and I wasnt sure if it was normal!) but sure now that it was just resting and it seemed to move okay when it shuffled back down the beach.

  206. Greenwich Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5601 — https://sites.zsl.org/inthethames/main/

    Observer description: The seal was swimming against the current, came to rest on the foreshore for a couple of minutes, then swam away. It was fairly small. Observer notes: I have a 2-minute video of this sighting, which I am happy to provide if its useful - I dont know if this form accepts videos.

  207. Near the life preserver at the Waitrose in Greenwich London
    Unidentified ZSL Thames Marine Mammal Survey, report 5599 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey

  208. Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5598 — https://sites.zsl.org/inthethames/main/

    Observer description: Only saw his head swimming the other way, looked brown in colour

  209. Opposite the O2 Arena London
    Unidentified ZSL Thames Marine Mammal Survey, report 5597 — https://sites.zsl.org/inthethames/main/

    Observer description: Small heading popping out the water. Seemed inquisitive about the rowers going past.

  210. Rotherhithe to the rear of the AO Hostel at the start of the jetty to the Uber Boat Ferry London
    Unidentified ZSL Thames Marine Mammal Survey, report 5596 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal lying on the beach. Rusty in colour. Was also here at low tide yesterday

  211. On the riverbank outside the hotel lying upside down in the sun London
    Unidentified ZSL Thames Marine Mammal Survey, report 5594 — https://sites.zsl.org/inthethames/main/

    Observer description: Rusty / Ginger seal lying upside down on the riverbank

  212. on the beach by the Double Tree Hotel in Rotherhithe London
    Unidentified ZSL Thames Marine Mammal Survey, report 5595 — https://sites.zsl.org/inthethames/main/

    Observer description: A man from Marine Animal Rescue came to check the seal was okay. He told me its a healthy individual, approx one year old. Observer notes: The hotel staff told me that the seal had been seen several times on that beach over the weekend (28th Feb/1stMarch). it was swimming out when the tide came in and rested when it was out. I have more photos in high resolution. Let me know if you would like them.

  213. 2m from the bank just south of Surrey Docks Farm London
    Unidentified ZSL Thames Marine Mammal Survey, report 5593 — https://sites.zsl.org/inthethames/main/

    Observer description: It had a brown/pale brown underside and light brown whiskers

  214. Between Vauxhaul bridge and Battersea Power Station London
    Unidentified ZSL Thames Marine Mammal Survey, report 5640 — https://sites.zsl.org/inthethames/main/

    Observer description: Whole animal

  215. Very close to the uber boat harbour on the Rotherhite side. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5592 — https://sites.zsl.org/inthethames/main/

    Observer description: Small, reddish fur

  216. On the beach in front of the hotel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5590 — https://sites.zsl.org/inthethames/main/

    Observer description: rounded face with small nose, ginger in colour

  217. On the Thames foreshore about 5 metres north of the Rotherhithe / Hotel jetty walkway London
    Unidentified ZSL Thames Marine Mammal Survey, report 5589 — https://sites.zsl.org/inthethames/main/

    Observer description: Reddish coat, didnt get full sight of face so unsure what type of seal. Probably Harbor

  218. A few hundred metres past Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5591 — https://sites.zsl.org/inthethames/main/

    Observer description: No distinguishing features, it was playing with/catching a fish

  219. Between Southwark and Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5587 — https://sites.zsl.org/inthethames/main/

    Observer description: I saw the whole form going under at one point but a few times the head pop up. I do alot of wildlife photography so I am absolutely certain it was a seal but I can’t say which due to not having my camera, only an iPhone unfortunately with no zoom lens. Observer notes: Sorry for the appalling photos but it was definitely a seal based on shape and behaviour pattern.

  220. On the slipway next to Poplar rowing club London
    Unidentified ZSL Thames Marine Mammal Survey, report 5586 — https://sites.zsl.org/inthethames/main/

    Observer description: It was patchy brown colours with dark brown/ black flippers

  221. Off Dolphin Hut Dorset, England
    Unidentified Durlston Country Park, Latest Sightings (2026 table) — https://www.durlston.co.uk/latest-sightings

    One Common Seal was recorded off Dolphin Hut. Harbour seal · 1 seal

  222. Next to Crown Pier London
    Unidentified ZSL Thames Marine Mammal Survey, report 5585 — https://sites.zsl.org/inthethames/main/

    Observer description: Head and face. Was bottling asleep.

  223. By Blackfriars Bridge - train station bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5583 — https://sites.zsl.org/inthethames/main/

    Observer description: Head clearly. Body was more submerged. Observer notes: Maxwell my 10 year old son spotted the seal. He was the first on the train station bridge to spot it. I am filling this form in on his behalf.

  224. In the river next to Waterloo bridge, by the RNLI London
    Unidentified ZSL Thames Marine Mammal Survey, report 5582 — https://sites.zsl.org/inthethames/main/

    Observer description: Muzzle, eyes watching us

  225. Millennium Bridge, close to Bankside pier. mid channel London
    Unidentified ZSL Thames Marine Mammal Survey, report 5581 — https://sites.zsl.org/inthethames/main/

    Observer description: We saw the seal swimming against the tide maintaining position. Diving occasionally but retuning to surface in roughly same spot. Observer notes: viewed from 11th floor riverside house

  226. South of Eel Pie Island, bank and towpath London
    Unidentified ZSL Thames Marine Mammal Survey, report 5579 — https://sites.zsl.org/inthethames/main/

    Observer description: Fawn/brown mottled coat. Dark grey muzzle. Told it was a young female, underweight. Observer notes: British Diver Marine Rescue were amazing. Medics turned up and assessed and decided to no action as resting. Concern as underweight. Think young female but not confirmed. Not been seen in area before. Original location description: South of Eel Pie Island - on the bank in morning, returned afternoon. Resting, moved onto towpath. BDMR informed/attended. Named Ohana. No action just monitoring. Back in water sometime during night on 16 Feb.26

  227. On the river path between Thames Young Marriners base and Teddington Lock London
    Unidentified ZSL Thames Marine Mammal Survey, report 5580 — https://sites.zsl.org/inthethames/main/

    Observer description: Grey.

  228. Syd’s Quay, Eel Pie Island London
    Unidentified ZSL Thames Marine Mammal Survey, report 5578 — https://sites.zsl.org/inthethames/main/

    Observer description: Seemed small, slim nose, had brownish head with darker grey nose area, spots on his back Observer notes: Was lying on a area with shallow water, the tide was a little low, it then swam off towards Teddington

  229. Next to Blackfriars bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5577 — https://sites.zsl.org/inthethames/main/

    Observer description: The shape of the head, eyes and nostrils

  230. In the Thames close to sanders nest view point, island gardens London
    Unidentified ZSL Thames Marine Mammal Survey, report 5576 — https://sites.zsl.org/inthethames/main/

    Observer description: Saw his head, he kept coming to the surface to breathe

  231. Under Tower Bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5575 — https://sites.zsl.org/inthethames/main/

    Observer description: Long round muzzle, round head. Black patches on body

  232. Thames path around Rotherhithe London
    Unidentified ZSL Thames Marine Mammal Survey, report 5574 — https://sites.zsl.org/inthethames/main/

    Observer description: Face out of the water looking around until eventually rolling down under the surface

  233. Next to Blackfriars bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5573 — https://sites.zsl.org/inthethames/main/

    Observer description: Its head and then its back as it dives down

  234. at the point on Canvey next to Canvey Yacht club London
    Unidentified ZSL Thames Marine Mammal Survey, report 5572 — https://sites.zsl.org/inthethames/main/

    Observer description: I was walking the dog along the sea wall and saw a black ball in the sea and as i got closer it turned and looked at me . . it was just floating and was not bothered by me at all . it then went under and cam up in front of me and again just watched me walking . My dog did even see it.

  235. At night on the river near Tate Modern before Blackfriars and after the Globe London
    Unidentified ZSL Thames Marine Mammal Survey, report 5571 — https://sites.zsl.org/inthethames/main/

    Observer description: It was at night so hard to see but 100% a seal. It came very close to the pier we were standing on. We saw its dark head and whiskers out of the water as it swam. Eventually after 1 min or 2 it dived underwater and disappeared.

  236. Opposite Watcombe Cottages, just upstream of Oliver’s Island, in Kew London
    Unidentified ZSL Thames Marine Mammal Survey, report 5570 — https://sites.zsl.org/inthethames/main/

    Observer description: Big dark grey, almost black looking Roman nosed seal. I saw it swimming around in the centre of the river. I saw its head & then body as it ducked under the water. It resurfaced three times in 10 minutes & swam to the bank on the Kew side (by me). I saw it face on, watched it doing something like blowing bubbles & it was watching me. It had semi beached itself & was resting for awhile. Very relaxed & then swam back out into the river. Observer notes: Yes! So exciting! I hope to see more of him! I bought the house overlooking the Thames Path last week & have come from the countryside. I was sad about leaving so much biodiversity behind. To see a seal opposite my new bedroom window has made my year! I’ll keep an eye out. I have a good track record with animal sightings. Next time I’ll be sure to take better photos for you.

  237. Opposite Capt Kidd public house/Marine policing unit HQ London
    Unidentified ZSL Thames Marine Mammal Survey, report 5569 — https://sites.zsl.org/inthethames/main/

    Observer description: A black head and body appearing out of the water.

  238. Laying across the Thames path London
    Unidentified ZSL Thames Marine Mammal Survey, report 5568 — https://sites.zsl.org/inthethames/main/

    Observer description: Long greyish brown body, long muzzle, light brown/cream around the neck and on the tips of the flippers

  239. Teddington Lock London
    Unidentified ZSL Thames Marine Mammal Survey, report 5567 — https://sites.zsl.org/inthethames/main/

    Observer description: Longer thicker muzzle than grey seal, dark/black in colour

  240. 500 metres downstream of Tower Bridge, on the southern side of the river near Butlers Wharf. London
    Unidentified ZSL Thames Marine Mammal Survey, report 5565 — https://sites.zsl.org/inthethames/main/

    Observer description: Head and nose poking out of the water looking around.

  241. I was walking across Putney Bridge and saw the seal in the middle of the water, not far from the bridge London
    Unidentified ZSL Thames Marine Mammal Survey, report 5564 — https://sites.zsl.org/inthethames/main/

    Observer description: The seal was initially looking away from me and then turned whilst swimming towards the bridge and then it dived under the water and didn’t resurface that side of the bridge as far as I could tell Observer notes: Sorry I’m not sure what type of seal it was but it was definitely a seal, looking at photos I think it was more likely a grey seal due to the nostril shape

  242. Seal London
    Unidentified ZSL Thames Marine Mammal Survey, report 5566 — https://sites.zsl.org/inthethames/main/

    Observer description: Seal, very definitely but not clear if grey or harbour. It was swimming and came out of water on to the beach in typical seal movement.