The Saint Lucia resorts with the warmest sea water temperature in August are Vieux Fort, Castries.
Below you can see a list of all popular Saint Lucia resorts and information about sea water temperature in August for the last two years.
| Resort Name | August 2025 | August 2024 | August 2023 |
|---|---|---|---|
| Vieux Fort | 88.5°F | 89.4°F | 89.2°F |
| Castries | 88.3°F | 89.2°F | 89.0°F |
Please see following sea water temperature averages charts for the warmest Saint Lucia resorts in August.
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.
