| Baker Beach (Clothing-Optional Area) | California | Coastal Waters | 14.5°C(58.1°F) | July, August, September, October | Live SST → |
| Bald Beach | North Carolina | Gulf of Mexico | 27.1°C(80.8°F) | June, July, August, September | Live SST → |
| Baldwin Beach | Hawaii | Coastal Waters | 26.7°C(80.1°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Ballard's Beach | Rhode Island | James Bay | 19.9°C(67.8°F) | July, August, September, October | Live SST → |
| Ballast Island Ledge | Maine | James Bay | 12.3°C(54.1°F) | July, August, September, October | Live SST → |
| Ballston Beach | Massachusetts | James Bay | 18°C(64.4°F) | June, July, August, September | Live SST → |
| Bannings Beach | California | Gulf of California | 20.8°C(69.4°F) | July, August, September, October | Live SST → |
| Barcelona Harbor beach | New York | James Bay | 21.3°C(70.3°F) | June, July, August, September | Live SST → |
| Barking Sands Beach | Hawaii | North Pacific Ocean | 27.1°C(80.8°F) | January, February, April, May, June, July, August, September, October, November, December | Live SST → |
| Barley Beach | Oregon | Coastal Waters | 11.4°C(52.5°F) | August, September, October, November | Live SST → |
| Barlow's Landing Beach | Massachusetts | James Bay | 20.2°C(68.4°F) | June, July, August, September | Live SST → |
| Barrington Beach | Rhode Island | James Bay | 19.6°C(67.3°F) | July, August, September, October | Live SST → |
| Bathing Beach Park | Michigan | James Bay | 19.1°C(66.4°F) | July, August, September, October | Live SST → |
| Bay Beach | North Carolina | Gulf of Mexico | 27°C(80.6°F) | June, July, August, September | Live SST → |
| Bay View Street Beach | Massachusetts | James Bay | 19.6°C(67.3°F) | June, July, August, September | Live SST → |
| Beach 3 | Washington | Coastal Waters | 14°C(57.2°F) | June, July, August, September | Live SST → |
| Beach Area | Florida | Gulf of Mexico | 29.8°C(85.6°F) | April, May, June, July, August, September, October, November | Live SST → |
| Beachwood Beach | New Jersey | Coastal Waters | 22.3°C(72.1°F) | July, August, September | Live SST → |
| Bean Hollow State Beach | California | Gulf of California | 14.9°C(58.8°F) | July, August, September, October | Live SST → |
| Bear Island Beach | United States | James Bay | 14.1°C(57.4°F) | July, August, September, October | Live SST → |
| Beaver Island Public Beach | Michigan | James Bay | 17.7°C(63.9°F) | July, August, September, October | Live SST → |
| Beaver River Beach | Minnesota | James Bay | 13.4°C(56.1°F) | July, August, September, October | Live SST → |
| Bedford Beach | New York | James Bay | 19.9°C(67.8°F) | June, July, August, September | Live SST → |
| Beekman Beach | New York | James Bay | 21.7°C(71.1°F) | June, July, August, September | Live SST → |
| Belcamp Beach | Maryland | Coastal Waters | 24.1°C(75.4°F) | July, August, September | Live SST → |
| Belvedero Beach | New Jersey | James Bay | 21.9°C(71.4°F) | June, July, August, September | Live SST → |
| Benson Beach | Washington | Coastal Waters | 14.7°C(58.5°F) | June, July, August, September | Live SST → |
| Bethany Beach | Delaware | Coastal Waters | 22.9°C(73.2°F) | July, August, September | Live SST → |
| Bethel Beach | Virginia | Coastal Waters | 24.8°C(76.6°F) | July, August, September | Live SST → |
| Beulah Beach | Michigan | James Bay | 18.4°C(65.1°F) | July, August, September, October | Live SST → |
| Beverly Beach | Oregon | Coastal Waters | 13.4°C(56.1°F) | June, July, August, September | Live SST → |
| Big Beach | Hawaii | Coastal Waters | 26.8°C(80.2°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Big Beach | Maine | James Bay | 16.1°C(61°F) | June, July, August, September | Live SST → |
| Big Beach | United States | James Bay | 13.5°C(56.3°F) | July, August, September, October | Live SST → |
| Big Beach | North Carolina | Gulf of Mexico | 27.1°C(80.8°F) | June, July, August, September | Live SST → |
| Big Rock Beach | California | Gulf of California | 20.2°C(68.4°F) | July, August, September, October | Live SST → |
| Big Shoal Beach | Michigan | James Bay | 16°C(60.8°F) | July, August, September, October | Live SST → |
| Billys Shore | Maine | James Bay | 14.6°C(58.3°F) | July, August, September, October | Live SST → |
| Birchhead Shore | Maine | James Bay | 14.6°C(58.3°F) | July, August, September, October | Live SST → |
| Black Beach | Massachusetts | James Bay | 17.5°C(63.5°F) | June, July, August, September | Live SST → |
| Black Point Beach | California | Coastal Waters | 12.6°C(54.7°F) | September, October, November, December | Live SST → |
| Black Rock Beach | Massachusetts | James Bay | 17.6°C(63.7°F) | June, July, August, September | Live SST → |
| Black's Beach | California | Gulf of California | 21.2°C(70.2°F) | July, August, September, October | Live SST → |
| Blacks Beach | California | Gulf of California | 21.2°C(70.2°F) | July, August, September, October | Live SST → |
| Blacksand Beach | Hawaii | Coastal Waters | 26.7°C(80.1°F) | January, February, March, April, May, June, July, August, September, October, November, December | Live SST → |
| Blind Creek Beach South | Florida | Gulf of Mexico | 28.9°C(84°F) | April, May, June, July, August, September, October, November, December | Live SST → |
| Bloomer Beach | New Jersey | James Bay | 21.8°C(71.2°F) | June, July, August, September | Live SST → |
| Blue Heron Beach | United States | Coastal Waters | 11.4°C(52.5°F) | June, July, August, September | Live SST → |
| Bluebeard 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 → |
| Bluff Point Beach | Connecticut | James Bay | 20.4°C(68.7°F) | July, August, September, October | Live SST → |