| Ferry Beach | Maine | James Bay | 16.5°C(61.7°F) | June, July, August, September | Live SST → |
| First Beach | Washington | Coastal Waters | 13.5°C(56.3°F) | June, July, August, September | Live SST → |
| First Beach | Washington | Coastal Waters | 12.2°C(54°F) | June, July, August, September | Live SST → |
| First Encounter Beach | Massachusetts | James Bay | 18.6°C(65.5°F) | June, July, August, September | Live SST → |
| Fisherman's Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Fishermans Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Five Mile Beach | New Jersey | Coastal Waters | 22.9°C(73.2°F) | July, August, September | Live SST → |
| Fleeton Beach | Virginia | Coastal Waters | 24.9°C(76.8°F) | July, August, September | Live SST → |
| Footbridge Beach | Maine | James Bay | 16.5°C(61.7°F) | June, July, August, September | Live SST → |
| Fords Beach | Connecticut | James Bay | 22.3°C(72.1°F) | July, August, September | Live SST → |
| Fort Island Beach | Florida | Gulf of Mexico | 29.1°C(84.4°F) | May, June, July, August, September, October | Live SST → |
| Fort Lauderdale | Florida | Atlantic Ocean | 29.6°C(85.3°F) | May, Jun, Jul, Aug, Sep, Oct | Live SST → |
| Fort Pickering Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Fort Trumbull Beach | Connecticut | James Bay | 22.3°C(72.1°F) | July, August, September | Live SST → |
| Fortescue Beach | New Jersey | Coastal Waters | 23.2°C(73.8°F) | July, August, September | Live SST → |
| Fortunes Rocks Beach | Maine | James Bay | 16.5°C(61.7°F) | June, July, August, September | Live SST → |
| Forty Steps Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Foss Beach | New Hampshire | James Bay | 16.9°C(62.4°F) | June, July, August, September | Live SST → |
| Foster Beach | Illinois | James Bay | 20.2°C(68.4°F) | July, August, September, October | Live SST → |
| Foster Memorial Bathing Beach | New York | James Bay | 20.7°C(69.3°F) | July, August, September, October | Live SST → |
| Four Mile Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Francis Beach | California | Gulf of California | 14.9°C(58.8°F) | July, August, September, October | Live SST → |
| Fred Benson Town Beach | Rhode Island | James Bay | 19.9°C(67.8°F) | July, August, September, October | Live SST → |
| Freddy Beach | Maine | James Bay | 16.5°C(61.7°F) | June, July, August, September | Live SST → |
| Front Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Front Beach | Connecticut | James Bay | 22.1°C(71.8°F) | July, August, September | Live SST → |
| Gallagher Beach | California | Gulf of California | 20.8°C(69.4°F) | July, August, September, October | Live SST → |
| Gallagher Beach | New York | James Bay | 21.3°C(70.3°F) | June, July, August, September | Live SST → |
| Garbage Beach | United States | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Gargathy Beach | Virginia | Coastal Waters | 24.9°C(76.8°F) | July, August, September | Live SST → |
| Garmet Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Gas House Basin | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Gas House Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| George Lane Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Gerritsen Beach | New York | James Bay | 21.8°C(71.2°F) | June, July, August, September | Live SST → |
| Giants Neck Beach | Connecticut | James Bay | 20.4°C(68.7°F) | July, August, September, October | Live SST → |
| Gibson Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Gibson Spit | Washington | Coastal Waters | 11.4°C(52.5°F) | June, July, August, September | Live SST → |
| Gibsons Beach | New York | James Bay | 20.9°C(69.6°F) | July, August, September, October | Live SST → |
| Gilley Beach | Maine | James Bay | 12.8°C(55°F) | July, August, September, October | Live SST → |
| Gillin's Beach | Hawaii | North Pacific Ocean | 27°C(80.6°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Gillson Beach | Illinois | James Bay | 20.1°C(68.2°F) | July, August, September, October | Live SST → |
| Gilmore Shore | New York | James Bay | 20.3°C(68.5°F) | July, August, September, October | Live SST → |
| Ginny Beach | Virginia | Coastal Waters | 24.9°C(76.8°F) | July, August, September | Live SST → |
| Glass Beach | California | Coastal Waters | 13.1°C(55.6°F) | August, September, October, November | Live SST → |
| Gleason Beach | California | Coastal Waters | 12.8°C(55°F) | August, September, October, November | Live SST → |
| Glen Cove Beach | Michigan | James Bay | 16.1°C(61°F) | July, August, September, October | Live SST → |
| Glendale Cove Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Glenlake Avenue Beach | Illinois | James Bay | 20.2°C(68.4°F) | July, August, September, October | Live SST → |
| Goat Rock Beach | California | Coastal Waters | 12.8°C(55°F) | August, September, October, November | Live SST → |