| Wainscott Beach | New York | James Bay | 20.5°C(68.9°F) | July, August, September, October | Live SST → |
| Waipio Beach | Hawaii | Coastal Waters | 26.9°C(80.4°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Waipū | Hawaii | Coastal Waters | 26.8°C(80.2°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Wales Beach | Maine | James Bay | 14.6°C(58.3°F) | July, August, September, October | Live SST → |
| Walk On Beach | California | Coastal Waters | 12.6°C(54.7°F) | September, October, November, December | Live SST → |
| Wallis Sands Beach | New Hampshire | James Bay | 16.9°C(62.4°F) | June, July, August, September | Live SST → |
| Wallops Beach | Virginia | Coastal Waters | 23.4°C(74.1°F) | July, August, September | Live SST → |
| Walnut Beach | Connecticut | James Bay | 22.3°C(72.1°F) | July, August, September | Live SST → |
| Walton Beach | United States | James Bay | 14.1°C(57.4°F) | July, August, September, October | Live SST → |
| Warmhouse Beach | Washington | Coastal Waters | 12.2°C(54°F) | June, July, August, September | Live SST → |
| Warren Town Beach | Rhode Island | James Bay | 19.6°C(67.3°F) | July, August, September, October | Live SST → |
| Watch Hill Beach Association Beach | Rhode Island | James Bay | 19.7°C(67.5°F) | July, August, September, October | Live SST → |
| Water Bay Beach | United States | Caribbean Sea | 29.2°C(84.6°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Waterfront | Florida | Gulf of Mexico | 29.8°C(85.6°F) | April, May, June, July, August, September, October, November | Live SST → |
| Watermill Beach | New York | James Bay | 20.7°C(69.3°F) | July, August, September, October | Live SST → |
| Wawaloli Beach | Hawaii | Coastal Waters | 27.3°C(81.1°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Weaverling Spit | Washington | Coastal Waters | 11.4°C(52.5°F) | June, July, August, September | Live SST → |
| Weed Beach | Connecticut | James Bay | 22.3°C(72.1°F) | July, August, September | Live SST → |
| Weekapaug Inn Beach | Rhode Island | James Bay | 19.7°C(67.5°F) | July, August, September, October | Live SST → |
| Wells Beach | Maine | James Bay | 16.5°C(61.7°F) | June, July, August, September | Live SST → |
| Wessagusset Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| West Beach | California | Gulf of California | 18.6°C(65.5°F) | July, August, September, October | Live SST → |
| West Beach | Texas | Gulf of Mexico | 29.2°C(84.6°F) | May, June, July, August, September, October | Live SST → |
| West Beach | Washington | Coastal Waters | 11.4°C(52.5°F) | June, July, August, September | Live SST → |
| West Beach | Massachusetts | James Bay | 19.9°C(67.8°F) | July, August, September, October | Live SST → |
| West Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| West Beach | Rhode Island | James Bay | 19.9°C(67.8°F) | July, August, September, October | Live SST → |
| West Beach | New York | James Bay | 21.4°C(70.5°F) | June, July, August, September | Live SST → |
| West Beach | Connecticut | James Bay | 22.3°C(72.1°F) | July, August, September | Live SST → |
| West Beach | Connecticut | James Bay | 20.9°C(69.6°F) | July, August, September, October | Live SST → |
| West Beach | United States | Coastal Waters | 11.4°C(52.5°F) | June, July, August, September | Live SST → |
| West End Beach | Michigan | James Bay | 18.5°C(65.3°F) | July, August, September, October | Live SST → |
| West Harbor Beach | New York | James Bay | 21.7°C(71.1°F) | June, July, August, September | Live SST → |
| West Neck Beach | New York | James Bay | 21.5°C(70.7°F) | June, July, August, September | Live SST → |
| West Shore Sandy Beach | Maine | James Bay | 16.1°C(61°F) | June, July, August, September | Live SST → |
| West Silver Sands Beach | Connecticut | James Bay | 22.1°C(71.8°F) | July, August, September | Live SST → |
| Weston Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |
| Westward Beach | California | Gulf of California | 19.4°C(66.9°F) | July, August, September, October | Live SST → |
| Whale Beach | New Jersey | Coastal Waters | 22.8°C(73°F) | July, August, September | Live SST → |
| Whale Beach | United States | James Bay | 13.5°C(56.3°F) | July, August, September, October | Live SST → |
| Whale Beach;Ludlam Beach | New Jersey | Coastal Waters | 22.8°C(73°F) | July, August, September | Live SST → |
| Whihala Beach | Indiana | James Bay | 20.3°C(68.5°F) | June, July, August, September | Live SST → |
| Whihala Park West Beach | Indiana | James Bay | 20.3°C(68.5°F) | June, July, August, September | Live SST → |
| White Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| White Beach | New York | James Bay | 21.4°C(70.5°F) | June, July, August, September | Live SST → |
| White Crest Beach | Massachusetts | James Bay | 18.3°C(64.9°F) | June, July, August, September | Live SST → |
| White Stone Beach | Virginia | Coastal Waters | 24.9°C(76.8°F) | July, August, September | Live SST → |
| Wickes Beach | United States | Coastal Waters | 24.1°C(75.4°F) | July, August, September | Live SST → |
| Wildcat Beach | California | Coastal Waters | 14.2°C(57.6°F) | July, August, September, October | Live SST → |
| Wilder Beach | California | Gulf of California | 14.9°C(58.8°F) | August, September, October, November | Live SST → |