In September warmest sea in USA is usually observed in the following locations: Key West, Fort Lauderdale, West Palm Beach.
Table below shows the average sea water temperature for marine resorts of USA in September for the last three years.
| Place name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Key West | 86.9°F | 87.4°F | 87.3°F |
| Fort Lauderdale | 86.4°F | 86.4°F | 86.2°F |
| West Palm Beach | 86.2°F | 86.4°F | 86.2°F |
| Miami Beach | 86.1°F | 86.3°F | 86.3°F |
| Naples | 86.1°F | 87.2°F | 86.8°F |
| Miami | 85.8°F | 86.0°F | 86.0°F |
| Houston | 84.9°F | 83.4°F | 86.1°F |
| Siesta Key | 84.9°F | 86.8°F | 85.8°F |
| Sarasota | 84.8°F | 86.7°F | 85.8°F |
| Cocoa Beach | 84.6°F | 85.2°F | 84.4°F |
| Tampa | 84.3°F | 86.0°F | 85.5°F |
| New Orleans | 84.3°F | 82.9°F | 85.1°F |
| Clearwater Beach | 84.0°F | 86.2°F | 85.5°F |
| Pensacola Beach | 83.9°F | 84.5°F | 85.0°F |
| St. George Island | 83.5°F | 84.0°F | 84.6°F |
| Panama City Beach | 83.4°F | 84.8°F | 85.1°F |
| Santa Rosa Beach | 83.4°F | 84.8°F | 85.3°F |
| Fort Walton Beach | 83.3°F | 84.5°F | 85.0°F |
| Destin | 83.1°F | 84.5°F | 85.0°F |
| Orlando | 82.8°F | 83.6°F | 83.4°F |
| Daytona Beach | 82.7°F | 83.2°F | 83.5°F |
| St. Augustine | 81.8°F | 82.7°F | 83.4°F |
| Kauai | 81.5°F | 79.4°F | 80.4°F |
| Jacksonville | 81.1°F | 82.0°F | 82.8°F |
| Honolulu | 80.6°F | 81.0°F | 80.2°F |
| Hawaii | 80.5°F | 80.8°F | 80.0°F |
| Maui | 79.9°F | 79.7°F | 79.4°F |
| Oahu | 79.8°F | 80.0°F | 79.6°F |
| Hilton Head Island | 79.8°F | 80.2°F | 82.3°F |
| Tybee Island | 79.8°F | 80.4°F | 82.0°F |
| Charleston (SC) | 78.8°F | 78.9°F | 82.2°F |
| Isle of Palms | 78.8°F | 79.3°F | 81.2°F |
| Myrtle Beach | 78.6°F | 79.5°F | 80.6°F |
| North Myrtle Beach | 78.5°F | 79.5°F | 80.5°F |
| Bald Head Island | 78.3°F | 78.8°F | 80.7°F |
| Carolina Beach | 78.0°F | 78.4°F | 79.9°F |
| Wilmington (NC) | 78.0°F | 78.3°F | 80.1°F |
| Wrightsville Beach | 77.9°F | 78.5°F | 80.2°F |
| North Topsail Beach | 77.7°F | 78.5°F | 80.2°F |
| Washington | 74.7°F | 75.2°F | 77.2°F |
| Kill Devil Hills | 74.6°F | 74.6°F | 76.7°F |
| Baltimore | 74.3°F | 74.4°F | 76.0°F |
| Tangier Island | 73.8°F | 74.9°F | 77.3°F |
| Virginia Beach | 73.8°F | 73.9°F | 76.4°F |
| Ocean City (MD) | 72.9°F | 71.6°F | 74.4°F |
| Bethany Beach | 72.7°F | 71.6°F | 73.6°F |
| Dewey Beach | 72.6°F | 71.6°F | 73.6°F |
| Rehoboth Beach | 72.5°F | 71.5°F | 74.0°F |
| Cape May | 72.2°F | 71.4°F | 73.9°F |
| Wildwood | 72.1°F | 71.3°F | 73.8°F |
| Atlantic City | 71.6°F | 71.3°F | 73.1°F |
| Beach Haven | 71.5°F | 71.2°F | 72.9°F |
| Long Beach Island | 71.5°F | 71.1°F | 72.9°F |
| New York | 71.2°F | 70.6°F | 72.2°F |
| Jersey City | 71.2°F | 70.6°F | 72.2°F |
| Santa Catalina Island | 70.6°F | 69.2°F | 69.6°F |
| Los Angeles | 70.6°F | 68.8°F | 68.9°F |
| Beverly Hills | 70.4°F | 68.7°F | 68.4°F |
| Hollywood | 70.4°F | 68.7°F | 68.4°F |
| Santa Monica | 70.3°F | 68.6°F | 68.4°F |
| Evanston | 69.6°F | 71.6°F | 69.5°F |
| San Jose | 69.5°F | 68.5°F | 68.6°F |
| Newport Beach | 69.5°F | 68.2°F | 68.0°F |
| Erie | 69.5°F | 70.6°F | 71.2°F |
| Malibu | 69.5°F | 66.8°F | 67.9°F |
| New Bedford | 69.5°F | 68.7°F | 71.1°F |
| Irvine | 69.4°F | 68.3°F | 67.9°F |
| Michigan City | 68.8°F | 70.7°F | 70.5°F |
| Montauk | 68.7°F | 67.4°F | 68.7°F |
| Santa Barbara | 68.5°F | 65.4°F | 66.6°F |
| Laguna Beach | 68.5°F | 68.6°F | 68.1°F |
| Buffalo (NY) | 68.0°F | 69.8°F | 69.7°F |
| Martha's Vineyard | 67.9°F | 66.0°F | 69.5°F |
| Nantucket | 67.7°F | 66.3°F | 68.3°F |
| Holland | 67.6°F | 68.8°F | 67.1°F |
| Long Beach (CA) | 67.5°F | 65.9°F | 66.3°F |
| San Diego | 67.3°F | 69.2°F | 67.5°F |
| Oakland | 67.1°F | 65.3°F | 66.7°F |
| Niagara Falls | 66.4°F | 68.2°F | 68.5°F |
| South Lake Tahoe | 65.9°F | 64.3°F | 64.9°F |
| Lake Tahoe | 65.9°F | 64.2°F | 64.9°F |
| Yosemite | 65.6°F | 65.6°F | 65.6°F |
| Chicago | 65.0°F | 71.6°F | 69.6°F |
| San Francisco | 64.8°F | 63.0°F | 64.7°F |
| Boston | 63.7°F | 64.4°F | 65.7°F |
| Old Orchard Beach | 61.9°F | 61.0°F | 63.6°F |
| Hampton Beach | 61.6°F | 62.3°F | 64.6°F |
| Hampton | 61.6°F | 62.3°F | 64.4°F |
| Santa Cruz | 61.3°F | 58.9°F | 61.1°F |
| Monterey | 60.7°F | 57.3°F | 60.6°F |
| Mount Desert Island | 58.6°F | 57.9°F | 59.2°F |
| Tacoma | 58.5°F | 57.7°F | 57.7°F |
| Bar Harbor | 58.5°F | 57.8°F | 59.0°F |
| Bellevue | 57.3°F | 57.0°F | 56.9°F |
| Seaside | 55.5°F | 56.6°F | 57.4°F |
| Depoe Bay | 54.9°F | 55.2°F | 54.8°F |
| Cannon Beach | 54.9°F | 56.5°F | 57.4°F |
| Florence | 54.1°F | 54.4°F | 53.5°F |
| Anchorage | 53.8°F | 52.6°F | 52.2°F |
| Rockaway Beach | 53.4°F | 55.4°F | 54.8°F |
Charts below show average sea water temperature for USA resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of USA resorts at that time.
Places in USA:
Name
°F
