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 |
| Corpus Christi | 85.8°F | 84.7°F | 87.1°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 |
| St. Petersburg | 84.1°F | 86.1°F | 85.3°F |
| Clearwater Beach | 84.0°F | 86.2°F | 85.5°F |
| Panama City Beach | 83.4°F | 84.8°F | 85.1°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 |
| Molokai | 80.4°F | 80.4°F | 80.5°F |
| Hilo | 80.4°F | 80.2°F | 79.9°F |
| Maui | 79.9°F | 79.7°F | 79.4°F |
| Oahu | 79.8°F | 80.0°F | 79.6°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 |
| Pawleys Island | 78.5°F | 79.3°F | 80.5°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 |
| Wilmington (DE) | 73.4°F | 73.4°F | 75.4°F |
| Rehoboth Beach | 72.5°F | 71.5°F | 74.0°F |
| Atlantic City | 71.6°F | 71.3°F | 73.1°F |
| Beach Haven | 71.5°F | 71.2°F | 72.9°F |
| Yonkers | 71.3°F | 71.1°F | 72.0°F |
| Cleveland | 71.3°F | 72.1°F | 72.1°F |
| New York | 71.2°F | 70.6°F | 72.2°F |
| Jersey City | 71.2°F | 70.6°F | 72.2°F |
| Los Angeles | 70.6°F | 68.8°F | 68.9°F |
| New Haven | 70.6°F | 70.6°F | 71.1°F |
| Hollywood | 70.4°F | 68.7°F | 68.4°F |
| Beverly Hills | 70.4°F | 68.7°F | 68.4°F |
| Santa Monica | 70.3°F | 68.6°F | 68.4°F |
| Westbrook | 69.7°F | 68.8°F | 69.5°F |
| San Jose | 69.5°F | 68.5°F | 68.6°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 |
| Buffalo (NY) | 68.0°F | 69.8°F | 69.7°F |
| Nantucket | 67.7°F | 66.3°F | 68.3°F |
| Holland | 67.6°F | 68.8°F | 67.1°F |
| Appleton | 67.5°F | 70.3°F | 68.9°F |
| Long Beach (CA) | 67.5°F | 65.9°F | 66.3°F |
| San Diego | 67.3°F | 69.2°F | 67.5°F |
| Green Bay | 67.1°F | 69.8°F | 67.7°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 |
| Cambridge | 63.9°F | 64.6°F | 65.7°F |
| Boston | 63.7°F | 64.4°F | 65.7°F |
| Wells | 62.2°F | 61.0°F | 64.1°F |
| Old Orchard Beach | 61.9°F | 61.0°F | 63.6°F |
| Marquette | 61.7°F | 63.7°F | 61.2°F |
| Hampton | 61.6°F | 62.3°F | 64.4°F |
| Monterey | 60.7°F | 57.3°F | 60.6°F |
| Rockland | 60.2°F | 59.2°F | 61.0°F |
| Grand Marais | 58.5°F | 63.6°F | 60.9°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 |
| Depoe Bay | 54.9°F | 55.2°F | 54.8°F |
| Cannon Beach | 54.9°F | 56.5°F | 57.4°F |
| Newport (OR) | 54.9°F | 55.4°F | 55.0°F |
| Sitka | 54.8°F | 53.4°F | 54.7°F |
| Florence | 54.1°F | 54.4°F | 53.5°F |
| Seward | 54.0°F | 52.5°F | 53.2°F |
| Anchorage | 53.8°F | 52.6°F | 52.2°F |
| Juneau | 53.4°F | 50.8°F | 52.2°F |
| Rockaway Beach | 53.4°F | 55.4°F | 54.8°F |
| Valdez | 52.0°F | 52.3°F | 52.4°F |
| Girdwood | 51.4°F | 50.2°F | 51.7°F |
| Wasilla | 51.3°F | 50.8°F | 50.7°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
