| Wilkins Beach | Virginia | Coastal Waters | 24.5°C(76.1°F) | July, August, September | Live SST → |
| Willard Beach | Maine | James Bay | 16.1°C(61°F) | June, July, August, September | Live SST → |
| William Morrow Beach | New Jersey | Coastal Waters | 22.6°C(72.7°F) | July, August, September | Live SST → |
| Willow Ave Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Windansea Beach | California | Gulf of California | 21.2°C(70.2°F) | July, August, September, October | Live SST → |
| Wingaersheek Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Winthrop Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Wipeout Beach | California | Gulf of California | 21.2°C(70.2°F) | July, August, September, October | Live SST → |
| Wreck Beach | California | Gulf of California | 15.1°C(59.2°F) | August, September, October, November | Live SST → |
| Yellow Banks | Washington | Coastal Waters | 12.9°C(55.2°F) | June, July, August, September | Live SST → |
| Yerba Buena Beach | California | Gulf of California | 19.4°C(66.9°F) | July, August, September, October | Live SST → |
| Yirrel Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Younger Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Zoar Valley Naturist Area | New York | James Bay | 21.3°C(70.3°F) | June, July, August, September | Live SST → |
| Zuma Beach | California | Gulf of California | 19.4°C(66.9°F) | July, August, September, October | Live SST → |