| Snorkel Park Beach | United Kingdom | Sargasso Sea | 27.6°C(81.7°F) | June, July, August, September, October | Live SST → |
| Soar Mill Cove | Devon | Celtic Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |
| South Beach | East Riding of Yorkshire | North Sea | 14°C(57.2°F) | July, August, September, October | Live SST → |
| South Beach | Ceredigion | Irish Sea | 16.6°C(61.9°F) | June, July, August, September | Live SST → |
| South Beach | Northumberland | North Sea | 13.6°C(56.5°F) | June, July, August, September | Live SST → |
| South Milton Sands | Devon | Celtic Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |
| South Sands | Devon | Celtic Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |
| South Sands | Shetland Islands | Rogaland County | 12.3°C(54.1°F) | July, August, September, October | Live SST → |
| Southsea nudist beach | Portsmouth | Irish Sea | 17.6°C(63.7°F) | July, August, September, October | Live SST → |
| Speeton Sands | East Riding of Yorkshire | North Sea | 14°C(57.2°F) | July, August, September, October | Live SST → |
| Spekes Mill Beach | Devon | Celtic Sea | 16.6°C(61.9°F) | July, August, September, October | Live SST → |
| St Catherine's Beach | United Kingdom | Sargasso Sea | 27.6°C(81.7°F) | June, July, August, September, October | Live SST → |
| St Ives (Porthmeor Beach) | Cornwall | Celtic Sea / Atlantic Ocean | 16.6°C(61.9°F) | Jul, Aug, Sep | Live SST → |
| St Margaret's Bay | Kent | Irish Sea | 17.6°C(63.7°F) | July, August, September, October | Live SST → |
| St Mary's Bay | Torbay | Celtic Sea | 16.6°C(61.9°F) | July, August, September, October | Live SST → |
| St Ninian's tombolo | Shetland Islands | Rogaland County | 12.2°C(54°F) | July, August, September, October | Live SST → |
| St Osyth Naturist Beach | Essex | Irish Sea | 17.5°C(63.5°F) | July, August, September, October | Live SST → |
| Stem | Cornwall | Celtic Sea | 15.9°C(60.6°F) | July, August, September, October | Live SST → |
| Stone Bay | United Kingdom | Irish Sea | 17.5°C(63.5°F) | July, August, September, October | Live SST → |
| Strath Bay Beach | Highland | Sea of the Hebrides | 13.1°C(55.6°F) | July, August, September, October | Live SST → |
| Studland Naturist Beach | Dorset | Celtic Sea | 17.4°C(63.3°F) | July, August, September, October | Live SST → |
| Summerleaze Beach | Cornwall | Celtic Sea | 16.6°C(61.9°F) | July, August, September, October | Live SST → |
| Sunny Cove | Devon | Celtic Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |
| Sunny Sands | Kent | Irish Sea | 17.6°C(63.7°F) | July, August, September, October | Live SST → |
| Swanage Beach | Dorset | Celtic Sea | 17.4°C(63.3°F) | July, August, September, October | Live SST → |
| Swanpool Beach | Cornwall | Celtic Sea | 15.9°C(60.6°F) | July, August, September, October | Live SST → |
| Swansea Bay | Swansea | Irish Sea | 17.4°C(63.3°F) | July, August, September, October | Live SST → |
| Swansea Beach | Swansea | Irish Sea | 17.4°C(63.3°F) | July, August, September, October | Live SST → |
| The Bar (sand & shingle) tidal area | Cornwall | Celtic Sea | 15.9°C(60.6°F) | July, August, September, October | Live SST → |
| The Bear's Beach | United Kingdom | Celtic Sea | 17.3°C(63.1°F) | July, August, September, October | Live SST → |
| The Gannel | Cornwall | Celtic Sea | 15.9°C(60.6°F) | July, August, September, October | Live SST → |
| Thomas' Porth or Shark's Pit | Isles of Scilly | Celtic Sea | 16.2°C(61.2°F) | June, July, August, September | Live SST → |
| Thornwick Bay | East Riding of Yorkshire | North Sea | 14°C(57.2°F) | July, August, September, October | Live SST → |
| Tolcarne Beach | Cornwall | Celtic Sea | 15.9°C(60.6°F) | July, August, September, October | Live SST → |
| Toll's Porth | United Kingdom | Celtic Sea | 16.2°C(61.2°F) | June, July, August, September | Live SST → |
| Torre Abbey Sands | Torbay | Celtic Sea | 16.6°C(61.9°F) | July, August, September, October | Live SST → |
| Torrisdale beach | Highland | Sea of the Hebrides | 13.2°C(55.8°F) | July, August, September, October | Live SST → |
| Towan | Cornwall | Celtic Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |
| Town Beach | United Kingdom | Celtic Sea | 16.2°C(61.2°F) | June, July, August, September | Live SST → |
| Traeth Aberdaron | Gwynedd | Irish Sea | 15.7°C(60.3°F) | July, August, September, October | Live SST → |
| Traeth Abersoch Beach | Gwynedd | Irish Sea | 16.2°C(61.2°F) | July, August, September, October | Live SST → |
| Traeth Bychan | Anglesey | Irish Sea | 15.7°C(60.3°F) | July, August, September, October | Live SST → |
| Traeth Crigyll | Anglesey | Irish Sea | 15.4°C(59.7°F) | July, August, September, October | Live SST → |
| Traeth Dolwen | Ceredigion | Irish Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |
| Traeth Harlech | Gwynedd | Irish Sea | 16.4°C(61.5°F) | June, July, August, September | Live SST → |
| Traeth Llandanwg Beach | Gwynedd | Irish Sea | 16.4°C(61.5°F) | June, July, August, September | Live SST → |
| Traeth Llydan | Anglesey | Irish Sea | 15.4°C(59.7°F) | July, August, September, October | Live SST → |
| Traeth Mawr | Anglesey | Irish Sea | 15.4°C(59.7°F) | July, August, September, October | Live SST → |
| Traeth Morfa Bychan / Black Rock Sands | Gwynedd | Irish Sea | 16.4°C(61.5°F) | June, July, August, September | Live SST → |
| Traeth Penbryn Beach | Ceredigion | Irish Sea | 16.1°C(61°F) | July, August, September, October | Live SST → |