The Cayman Islands resorts with the warmest sea water temperature in September are Cayman Brac, Little Cayman and Grand Cayman.
Below you can see a list of all popular Cayman Islands resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Cayman Brac | 91.8°F | 91.5°F | 91.8°F |
| Little Cayman | 91.7°F | 91.5°F | 91.8°F |
| Grand Cayman | 91.6°F | 91.0°F | 91.1°F |
| George Town | 91.6°F | 90.9°F | 91.1°F |
Please see following sea water temperature averages charts for the warmest Cayman Islands resorts in September.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
Sea Water
Temperature
Temperature
| Cayman Brac |
Sea Water
Temperature
Temperature
| Little Cayman |
Sea Water
Temperature
Temperature
| Grand Cayman |
