The Sri Lanka resorts with the warmest sea water temperature in September are Pasikuda, Batticaloa and Jafna.
Below you can see a list of all popular Sri Lanka resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Pasikuda | 89.2°F | 88.3°F | 88.8°F |
| Batticaloa | 89.2°F | 88.3°F | 89.5°F |
| Jafna | 89.1°F | 88.5°F | 88.9°F |
| Bentota | 88.6°F | 87.6°F | 87.2°F |
| Beruwela | 88.6°F | 87.7°F | 87.4°F |
| Induruwa | 88.6°F | 87.5°F | 87.0°F |
| Kalutara | 88.5°F | 87.9°F | 87.6°F |
| Wadduwa | 88.5°F | 87.8°F | 87.9°F |
| Ahungalla | 88.4°F | 87.4°F | 86.9°F |
| Panadura | 88.4°F | 87.7°F | 87.9°F |
| Dehiwala Mount Lavinia | 88.3°F | 87.5°F | 87.9°F |
| Balapitiya | 88.3°F | 87.3°F | 87.0°F |
| Colombo | 88.2°F | 87.4°F | 87.9°F |
| Trincomalee | 88.2°F | 87.4°F | 87.4°F |
| Negombo | 88.1°F | 87.3°F | 88.0°F |
| Marawila | 87.9°F | 87.0°F | 87.8°F |
| Hikkaduwa | 87.9°F | 87.3°F | 87.7°F |
| Habarana | 87.8°F | 87.3°F | 87.2°F |
| Halle | 87.6°F | 87.1°F | 87.6°F |
| Unawatuna | 87.6°F | 87.1°F | 87.6°F |
| Marissa | 87.4°F | 87.0°F | 87.7°F |
| Koggalla | 87.4°F | 87.1°F | 87.6°F |
| Weligama | 87.3°F | 86.9°F | 87.5°F |
| Dikwella | 87.0°F | 86.6°F | 87.4°F |
| Hambantota | 86.8°F | 86.0°F | 87.0°F |
| Tangalle | 86.8°F | 86.2°F | 87.2°F |
Please see following sea water temperature averages charts for the warmest Sri Lanka 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.
