In September warmest sea in USA is usually observed in the following locations: Key West, Key Largo, Naples.
Table below shows the average sea water temperature for marine resorts of USA in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Key West | 87.8°F | 86.9°F | 87.4°F |
| Key Largo | 87.2°F | 86.6°F | 87.1°F |
| Naples | 87.0°F | 86.1°F | 87.2°F |
| Galveston | 87.0°F | 85.5°F | 83.7°F |
| Siesta Key | 86.9°F | 84.9°F | 86.8°F |
| Houston | 86.9°F | 84.9°F | 83.4°F |
| Corpus Christi | 86.8°F | 85.8°F | 84.7°F |
| Sarasota | 86.8°F | 84.8°F | 86.7°F |
| West Palm Beach | 86.6°F | 86.2°F | 86.4°F |
| Fort Lauderdale | 86.6°F | 86.4°F | 86.4°F |
| New Orleans | 86.4°F | 84.3°F | 82.9°F |
| Cape Coral | 86.3°F | 85.2°F | 86.5°F |
| Orange Beach | 86.0°F | 84.0°F | 84.1°F |
| Pensacola Beach | 85.9°F | 83.9°F | 84.5°F |
| Tampa | 85.9°F | 84.3°F | 86.0°F |
| Clearwater Beach | 85.9°F | 84.0°F | 86.2°F |
| Panama City Beach | 85.8°F | 83.4°F | 84.8°F |
| Miami Beach | 85.8°F | 86.1°F | 86.3°F |
| Fort Walton Beach | 85.7°F | 83.3°F | 84.5°F |
| Pensacola | 85.7°F | 83.9°F | 84.2°F |
| Destin | 85.6°F | 83.1°F | 84.5°F |
| Santa Rosa Beach | 85.5°F | 83.4°F | 84.8°F |
| Miami | 85.2°F | 85.8°F | 86.0°F |
| St. George Island | 85.2°F | 83.5°F | 84.0°F |
| South Padre Island | 84.7°F | 86.0°F | 85.8°F |
| Port St. Lucie | 84.7°F | 84.3°F | 84.9°F |
| Cocoa Beach | 84.0°F | 84.6°F | 85.2°F |
| Jekyll Island | 83.6°F | 80.7°F | 81.9°F |
| St. Simons Island | 83.4°F | 80.7°F | 81.9°F |
| Tybee Island | 83.4°F | 79.8°F | 80.4°F |
| Hilton Head Island | 83.2°F | 79.8°F | 80.2°F |
| Amelia Island | 83.1°F | 81.0°F | 81.8°F |
| Jacksonville | 82.9°F | 81.1°F | 82.0°F |
| St. Augustine | 82.9°F | 81.8°F | 82.7°F |
| Kiawah Island | 82.7°F | 79.3°F | 79.6°F |
| Orlando | 82.7°F | 82.8°F | 83.6°F |
| Charleston (SC) | 82.6°F | 78.8°F | 78.9°F |
| Daytona Beach | 82.5°F | 82.7°F | 83.2°F |
| Isle of Palms | 82.4°F | 78.8°F | 79.3°F |
| North Myrtle Beach | 82.1°F | 78.5°F | 79.5°F |
| Myrtle Beach | 82.0°F | 78.6°F | 79.5°F |
| Bald Head Island | 81.9°F | 78.3°F | 78.8°F |
| Honolulu | 81.3°F | 80.6°F | 81.0°F |
| Hawaii | 81.0°F | 80.5°F | 80.8°F |
| Carolina Beach | 80.9°F | 78.0°F | 78.4°F |
| Wilmington (NC) | 80.7°F | 78.0°F | 78.3°F |
| Oahu | 80.4°F | 79.8°F | 80.0°F |
| Maui | 80.0°F | 79.9°F | 79.7°F |
| Kauai | 80.0°F | 81.5°F | 79.4°F |
| Outer Banks | 79.2°F | 75.3°F | 75.0°F |
| Kill Devil Hills | 78.3°F | 74.6°F | 74.6°F |
| Washington | 78.2°F | 74.7°F | 75.2°F |
| Virginia Beach | 77.5°F | 73.8°F | 73.9°F |
| Baltimore | 77.3°F | 74.3°F | 74.4°F |
| Ocean City (MD) | 75.1°F | 72.9°F | 71.6°F |
| Bethany Beach | 74.3°F | 72.7°F | 71.6°F |
| Sea Isle City | 74.3°F | 71.8°F | 71.2°F |
| Dewey Beach | 74.2°F | 72.6°F | 71.6°F |
| Rehoboth Beach | 74.0°F | 72.5°F | 71.5°F |
| Cape May | 74.0°F | 72.2°F | 71.4°F |
| Atlantic City | 73.9°F | 71.6°F | 71.3°F |
| Irvine | 73.8°F | 69.4°F | 68.3°F |
| Newport Beach | 73.7°F | 69.5°F | 68.2°F |
| San Diego | 73.7°F | 67.3°F | 69.2°F |
| Laguna Beach | 73.7°F | 68.5°F | 68.6°F |
| Los Angeles | 73.5°F | 70.6°F | 68.8°F |
| Beverly Hills | 73.4°F | 70.4°F | 68.7°F |
| Santa Monica | 73.4°F | 70.3°F | 68.6°F |
| Hollywood | 73.4°F | 70.4°F | 68.7°F |
| Santa Catalina Island | 73.3°F | 70.6°F | 69.2°F |
| Long Beach Island | 73.3°F | 71.5°F | 71.1°F |
| Port Clinton | 72.9°F | 70.8°F | 71.9°F |
| Malibu | 72.6°F | 69.5°F | 66.8°F |
| Jersey City | 72.5°F | 71.2°F | 70.6°F |
| New York | 72.5°F | 71.2°F | 70.6°F |
| Long Beach (CA) | 72.0°F | 67.5°F | 65.9°F |
| Santa Barbara | 71.4°F | 68.5°F | 65.4°F |
| New Bedford | 69.9°F | 69.5°F | 68.7°F |
| Niagara Falls | 68.7°F | 66.4°F | 68.2°F |
| Chicago | 68.5°F | 65.0°F | 71.6°F |
| San Jose | 67.9°F | 69.5°F | 68.5°F |
| Nantucket | 67.8°F | 67.7°F | 66.3°F |
| Martha's Vineyard | 67.6°F | 67.9°F | 66.0°F |
| Michigan City | 66.4°F | 68.8°F | 70.7°F |
| Holland | 65.8°F | 67.6°F | 68.8°F |
| San Francisco | 64.7°F | 64.8°F | 63.0°F |
| Boston | 64.6°F | 63.7°F | 64.4°F |
| Yosemite | 64.5°F | 65.6°F | 65.6°F |
| Hampton Beach | 63.8°F | 61.6°F | 62.3°F |
| South Lake Tahoe | 63.5°F | 65.9°F | 64.3°F |
| Lake Tahoe | 63.2°F | 65.9°F | 64.2°F |
| Milwaukee | 63.0°F | 66.9°F | 71.0°F |
| Old Orchard Beach | 61.3°F | 61.9°F | 61.0°F |
| Santa Cruz | 60.5°F | 61.3°F | 58.9°F |
| Monterey | 59.8°F | 60.7°F | 57.3°F |
| Tacoma | 57.9°F | 58.5°F | 57.7°F |
| Cannon Beach | 57.5°F | 54.9°F | 56.5°F |
| Bellevue | 57.3°F | 57.3°F | 57.0°F |
| Florence | 55.7°F | 54.1°F | 54.4°F |
| Anchorage | 52.9°F | 53.8°F | 52.6°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
