| Steep Bank Beach | United States | James Bay | 14.1°C(57.4°F) | July, August, September, October | Live SST → |
| Stehli Beach | New York | James Bay | 21.7°C(71.1°F) | June, July, August, September | Live SST → |
| Stevens Pond Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Stewart Beach | United States | Gulf of Mexico | 29.1°C(84.4°F) | May, June, July, August, September, October | Live SST → |
| Stinson Beach | California | Coastal Waters | 14.5°C(58.1°F) | July, August, September, October | Live SST → |
| Stone Lake Beach | Indiana | James Bay | 20.6°C(69.1°F) | June, July, August, September | Live SST → |
| Stoney Point | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Stramski's Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Strawberry Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Strong Island Beach | Massachusetts | James Bay | 18.5°C(65.3°F) | June, July, August, September | Live SST → |
| Sullivans Beach | California | Gulf of California | 20.5°C(68.9°F) | July, August, September, October | Live SST → |
| Sunny Beach | Texas | Gulf of Mexico | 29.2°C(84.6°F) | May, June, July, August, September, October | Live SST → |
| Sunny Cove Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Sunray Beach | New Jersey | Coastal Waters | 23°C(73.4°F) | July, August, September | Live SST → |
| Sunrise Beach | Massachusetts | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Sunrise Beach | Illinois | James Bay | 19.5°C(67.1°F) | July, August, September, October | Live SST → |
| Sunrise Park Beach | South Carolina | Gulf of Mexico | 27.3°C(81.1°F) | June, July, August, September | Live SST → |
| Sunset Beach | Florida | Gulf of Mexico | 29.4°C(84.9°F) | May, June, July, August, September, October | Live SST → |
| Sunset Beach | Hawaii | Coastal Waters | 26.8°C(80.2°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Sunset Beach | Washington | Coastal Waters | 11.4°C(52.5°F) | June, July, August, September | Live SST → |
| Sunset Beach | Rhode Island | James Bay | 19.6°C(67.3°F) | July, August, September, October | Live SST → |
| Sunset Beach | Connecticut | James Bay | 22.1°C(71.8°F) | July, August, September | Live SST → |
| Sunset State Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Sunshine Beach | California | Coastal Waters | 13.2°C(55.8°F) | August, September, October, November | Live SST → |
| Surf Drive Beach | Massachusetts | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Surfside Beach | California | Gulf of California | 20.7°C(69.3°F) | July, August, September, October | Live SST → |
| Surfside Beach | Maine | James Bay | 16.1°C(61°F) | June, July, August, September | Live SST → |
| Swift Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Swifts Beach | Massachusetts | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Swifts Neck Association | Massachusetts | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Table Rock Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Tabletops | California | Gulf of California | 21.2°C(70.2°F) | July, August, September, October | Live SST → |
| Tankards Beach | Virginia | Coastal Waters | 24.8°C(76.6°F) | July, August, September | Live SST → |
| Taylors Point Beach | Massachusetts | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Teachers Beach | California | Coastal Waters | 13.2°C(55.8°F) | August, September, October, November | Live SST → |
| Teal Lake Beach | Michigan | James Bay | 15.1°C(59.2°F) | July, August, September, October | Live SST → |
| Teddy Beach | Rhode Island | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Tenean Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Tennessee Beach | California | Coastal Waters | 14.5°C(58.1°F) | July, August, September, October | Live SST → |
| The Brook Beach | United States | James Bay | 14.1°C(57.4°F) | July, August, September, October | Live SST → |
| The Cove | New Jersey | Coastal Waters | 22.9°C(73.2°F) | July, August, September | Live SST → |
| The Creek Beach | New York | James Bay | 21.7°C(71.1°F) | June, July, August, September | Live SST → |
| The Sands | South Carolina | Gulf of Mexico | 27.6°C(81.7°F) | June, July, August, September, October | Live SST → |
| The Strand | Massachusetts | James Bay | 18.9°C(66°F) | June, July, August, September | Live SST → |
| Third Beach | Washington | Coastal Waters | 12.2°C(54°F) | June, July, August, September | Live SST → |
| Third Beach | Washington | Coastal Waters | 13.5°C(56.3°F) | June, July, August, September | Live SST → |
| Third Beach | Rhode Island | James Bay | 19.7°C(67.5°F) | July, August, September, October | Live SST → |
| Thomas Point Beach | Maine | James Bay | 15.2°C(59.4°F) | July, August, September, October | Live SST → |
| Thompsons Beach | New Jersey | Coastal Waters | 23°C(73.4°F) | July, August, September | Live SST → |
| Thorndale Avenue Beach | Illinois | James Bay | 20.2°C(68.4°F) | July, August, September, October | Live SST → |