In September warmest sea in USA is usually observed in the following locations: Key West, Naples, Sarasota.
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 | 88.7°F | 86.9°F | 87.4°F |
| Naples | 88.0°F | 86.1°F | 87.2°F |
| Sarasota | 87.9°F | 84.8°F | 86.7°F |
| Siesta Key | 87.9°F | 84.9°F | 86.8°F |
| Corpus Christi | 87.4°F | 85.8°F | 84.7°F |
| Houston | 87.4°F | 84.9°F | 83.4°F |
| Tampa | 87.2°F | 84.3°F | 86.0°F |
| Clearwater Beach | 87.1°F | 84.0°F | 86.2°F |
| New Orleans | 86.8°F | 84.3°F | 82.9°F |
| West Palm Beach | 86.8°F | 86.2°F | 86.4°F |
| Fort Lauderdale | 86.6°F | 86.4°F | 86.4°F |
| Miami Beach | 86.5°F | 86.1°F | 86.3°F |
| Panama City Beach | 86.4°F | 83.4°F | 84.8°F |
| Pensacola Beach | 86.3°F | 83.9°F | 84.5°F |
| Pensacola | 86.3°F | 83.9°F | 84.2°F |
| Fort Walton Beach | 86.3°F | 83.3°F | 84.5°F |
| Orange Beach | 86.3°F | 84.0°F | 84.1°F |
| Destin | 86.3°F | 83.1°F | 84.5°F |
| Santa Rosa Beach | 86.2°F | 83.4°F | 84.8°F |
| Miami | 85.9°F | 85.8°F | 86.0°F |
| St. George Island | 85.9°F | 83.5°F | 84.0°F |
| Port St. Lucie | 84.9°F | 84.3°F | 84.9°F |
| Cocoa Beach | 84.7°F | 84.6°F | 85.2°F |
| Tybee Island | 84.6°F | 79.8°F | 80.4°F |
| Hilton Head Island | 84.6°F | 79.8°F | 80.2°F |
| Edisto Beach | 84.3°F | 79.5°F | 79.7°F |
| Kiawah Island | 84.0°F | 79.3°F | 79.6°F |
| South Padre Island | 84.0°F | 86.0°F | 85.8°F |
| Charleston (SC) | 83.9°F | 78.8°F | 78.9°F |
| Isle of Palms | 83.8°F | 78.8°F | 79.3°F |
| Amelia Island | 83.6°F | 81.0°F | 81.8°F |
| North Myrtle Beach | 83.6°F | 78.5°F | 79.5°F |
| Myrtle Beach | 83.3°F | 78.6°F | 79.5°F |
| Bald Head Island | 83.3°F | 78.3°F | 78.8°F |
| Jacksonville | 83.2°F | 81.1°F | 82.0°F |
| Orlando | 82.7°F | 82.8°F | 83.6°F |
| Daytona Beach | 82.5°F | 82.7°F | 83.2°F |
| Carolina Beach | 82.0°F | 78.0°F | 78.4°F |
| North Topsail Beach | 81.7°F | 77.7°F | 78.5°F |
| Wilmington (NC) | 81.6°F | 78.0°F | 78.3°F |
| Washington | 81.5°F | 74.7°F | 75.2°F |
| Honolulu | 81.2°F | 80.6°F | 81.0°F |
| Kill Devil Hills | 81.0°F | 74.6°F | 74.6°F |
| Hawaii | 80.8°F | 80.5°F | 80.8°F |
| Oahu | 80.3°F | 79.8°F | 80.0°F |
| Virginia Beach | 79.9°F | 73.8°F | 73.9°F |
| Maui | 79.9°F | 79.9°F | 79.7°F |
| Kauai | 79.9°F | 81.5°F | 79.4°F |
| Baltimore | 79.8°F | 74.3°F | 74.4°F |
| Ocean City (MD) | 77.7°F | 72.9°F | 71.6°F |
| Bethany Beach | 76.9°F | 72.7°F | 71.6°F |
| Sea Isle City | 76.9°F | 71.8°F | 71.2°F |
| Dewey Beach | 76.6°F | 72.6°F | 71.6°F |
| Wildwood | 76.6°F | 72.1°F | 71.3°F |
| Cape May | 76.4°F | 72.2°F | 71.4°F |
| Atlantic City | 76.3°F | 71.6°F | 71.3°F |
| Rehoboth Beach | 76.2°F | 72.5°F | 71.5°F |
| Port Clinton | 75.8°F | 70.8°F | 71.9°F |
| Long Beach Island | 75.5°F | 71.5°F | 71.1°F |
| Jersey City | 74.1°F | 71.2°F | 70.6°F |
| New York | 74.0°F | 71.2°F | 70.6°F |
| Irvine | 74.0°F | 69.4°F | 68.3°F |
| Newport Beach | 73.9°F | 69.5°F | 68.2°F |
| Green Bay | 73.9°F | 67.1°F | 69.8°F |
| Laguna Beach | 73.8°F | 68.5°F | 68.6°F |
| Los Angeles | 73.8°F | 70.6°F | 68.8°F |
| Beverly Hills | 73.7°F | 70.4°F | 68.7°F |
| Hollywood | 73.7°F | 70.4°F | 68.7°F |
| Santa Monica | 73.7°F | 70.3°F | 68.6°F |
| Santa Catalina Island | 73.6°F | 70.6°F | 69.2°F |
| San Diego | 73.4°F | 67.3°F | 69.2°F |
| Malibu | 72.8°F | 69.5°F | 66.8°F |
| New Bedford | 72.0°F | 69.5°F | 68.7°F |
| Chicago | 71.9°F | 65.0°F | 71.6°F |
| Long Beach (CA) | 71.5°F | 67.5°F | 65.9°F |
| Santa Barbara | 71.2°F | 68.5°F | 65.4°F |
| Holland | 71.2°F | 67.6°F | 68.8°F |
| Michigan City | 71.2°F | 68.8°F | 70.7°F |
| Nantucket | 69.9°F | 67.7°F | 66.3°F |
| Martha's Vineyard | 69.2°F | 67.9°F | 66.0°F |
| San Jose | 68.6°F | 69.5°F | 68.5°F |
| Boston | 66.2°F | 63.7°F | 64.4°F |
| Milwaukee | 66.0°F | 66.9°F | 71.0°F |
| Yosemite | 65.9°F | 65.6°F | 65.6°F |
| Hampton Beach | 65.6°F | 61.6°F | 62.3°F |
| Hampton | 65.6°F | 61.6°F | 62.3°F |
| San Francisco | 64.5°F | 64.8°F | 63.0°F |
| South Lake Tahoe | 64.5°F | 65.9°F | 64.3°F |
| Lake Tahoe | 64.3°F | 65.9°F | 64.2°F |
| Old Orchard Beach | 62.9°F | 61.9°F | 61.0°F |
| Santa Cruz | 60.6°F | 61.3°F | 58.9°F |
| Monterey | 59.4°F | 60.7°F | 57.3°F |
| Seaside | 59.2°F | 55.5°F | 56.6°F |
| Cannon Beach | 58.8°F | 54.9°F | 56.5°F |
| Tacoma | 58.4°F | 58.5°F | 57.7°F |
| Bar Harbor | 58.0°F | 58.5°F | 57.8°F |
| Rockaway Beach | 57.7°F | 53.4°F | 55.4°F |
| Bellevue | 57.5°F | 57.3°F | 57.0°F |
| Florence | 56.1°F | 54.1°F | 54.4°F |
| Anchorage | 53.6°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
