In September warmest sea in Florida is usually observed in the following locations: Sarasota, Siesta Key, St. Petersburg.
Table below shows the average sea water temperature for marine resorts of Florida in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Sarasota | 87.9°F | 84.8°F | 86.7°F |
| Siesta Key | 87.9°F | 84.9°F | 86.8°F |
| St. Petersburg | 87.2°F | 84.1°F | 86.1°F |
| Tampa | 87.2°F | 84.3°F | 86.0°F |
| Clearwater Beach | 87.1°F | 84.0°F | 86.2°F |
| Port St. Lucie | 84.8°F | 84.3°F | 84.9°F |
| Cocoa Beach | 84.5°F | 84.6°F | 85.2°F |
| Orlando | 82.5°F | 82.8°F | 83.6°F |
| Daytona Beach | 82.3°F | 82.7°F | 83.2°F |
| Kissimmee | 32.0°F | 32.0°F | 32.0°F |
Charts below show average sea water temperature for Florida resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Florida resorts at that time.
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