The Puerto Rico resorts with the warmest sea water temperature in August are Mayaguez, Ponce and Aguadilla.
Below you can see a list of all popular Puerto Rico resorts and information about sea water temperature in August for the last two years.
| Resort Name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| Mayaguez | 89.0°F | 89.1°F | 89.8°F |
| Ponce | 88.9°F | 89.3°F | 90.1°F |
| Aguadilla | 88.4°F | 88.9°F | 89.6°F |
| San Juan | 88.0°F | 88.7°F | 89.2°F |
| Isabella | 87.9°F | 88.5°F | 89.4°F |
| Arecibo | 87.6°F | 88.4°F | 89.1°F |
Please see following sea water temperature averages charts for the warmest Puerto Rico 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.
