In September warmest sea in USA is usually observed in the following locations: Key West, Fort Lauderdale, Everglades.
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 |
| Everglades | 86.2°F | 87.0°F | 86.8°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 |
| South Padre Island | 86.0°F | 85.8°F | 86.3°F |
| Corpus Christi | 85.8°F | 84.7°F | 87.1°F |
| Miami | 85.8°F | 86.0°F | 86.0°F |
| Galveston Island | 85.5°F | 84.4°F | 86.6°F |
| Galveston | 85.5°F | 83.7°F | 86.5°F |
| Cape Coral | 85.2°F | 86.5°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 |
| Orange Beach | 84.0°F | 84.1°F | 85.4°F |
| Clearwater Beach | 84.0°F | 86.2°F | 85.5°F |
| Pensacola Beach | 83.9°F | 84.5°F | 85.0°F |
| Pensacola | 83.9°F | 84.2°F | 84.4°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 |
| Kailua Kona | 80.9°F | 81.0°F | 80.5°F |
| Jekyll Island | 80.7°F | 81.9°F | 82.0°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 |
| Charleston (SC) | 78.8°F | 78.9°F | 82.2°F |
| Myrtle Beach | 78.6°F | 79.5°F | 80.6°F |
| Wilmington (NC) | 78.0°F | 78.3°F | 80.1°F |
| Washington | 74.7°F | 75.2°F | 77.2°F |
| Corolla | 74.6°F | 74.2°F | 76.8°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 |
| Rehoboth Beach | 72.5°F | 71.5°F | 74.0°F |
| Atlantic City | 71.6°F | 71.3°F | 73.1°F |
| Long Beach Island | 71.5°F | 71.1°F | 72.9°F |
| Stamford | 71.3°F | 71.7°F | 72.4°F |
| Cleveland | 71.3°F | 72.1°F | 72.1°F |
| Newark | 71.2°F | 70.7°F | 72.2°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 |
| San Jose | 69.5°F | 68.5°F | 68.6°F |
| Newport Beach | 69.5°F | 68.2°F | 68.0°F |
| Malibu | 69.5°F | 66.8°F | 67.9°F |
| Michigan City | 68.8°F | 70.7°F | 70.5°F |
| Newport (RI) | 68.8°F | 67.9°F | 70.0°F |
| Montauk | 68.7°F | 67.4°F | 68.7°F |
| Anaheim | 68.6°F | 67.2°F | 67.2°F |
| Santa Barbara | 68.5°F | 65.4°F | 66.6°F |
| Laguna Beach | 68.5°F | 68.6°F | 68.1°F |
| Rochester (NY) | 68.0°F | 69.2°F | 69.8°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 |
| Green Bay | 67.1°F | 69.8°F | 67.7°F |
| Milwaukee | 66.9°F | 71.0°F | 67.4°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 |
| Mackinac Island | 61.9°F | 64.5°F | 61.9°F |
| Hampton | 61.6°F | 62.3°F | 64.4°F |
| Santa Cruz | 61.3°F | 58.9°F | 61.1°F |
| Portsmouth | 61.1°F | 61.2°F | 63.6°F |
| Monterey | 60.7°F | 57.3°F | 60.6°F |
| Bellingham | 59.8°F | 57.8°F | 58.1°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 |
| Ketchikan | 57.1°F | 54.9°F | 55.5°F |
| Sitka | 54.8°F | 53.4°F | 54.7°F |
| Florence | 54.1°F | 54.4°F | 53.5°F |
| Anchorage | 53.8°F | 52.6°F | 52.2°F |
| Juneau | 53.4°F | 50.8°F | 52.2°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
