The Costa Rica resorts with the warmest sea water temperature in August are San Jose, Heredia and Cartago.
Below you can see a list of all popular Costa Rica resorts and information about sea water temperature in August for the last two years.
| Resort Name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| San Jose | 91.0°F | 88.2°F | 88.0°F |
| Heredia | 90.9°F | 88.2°F | 87.9°F |
| Cartago | 90.9°F | 88.2°F | 87.9°F |
| Santa Teresa | 90.9°F | 88.1°F | 88.2°F |
| Jaco | 90.9°F | 88.3°F | 88.0°F |
| Alajuela | 90.8°F | 88.2°F | 88.0°F |
| Quepos | 90.8°F | 88.1°F | 87.8°F |
| Samara | 90.7°F | 88.2°F | 88.4°F |
| El Roble | 90.6°F | 88.0°F | 87.8°F |
| Tamarindo | 90.1°F | 87.9°F | 88.0°F |
| Playa Flamingo | 89.6°F | 87.8°F | 88.0°F |
| Playas del Coco | 89.4°F | 87.8°F | 88.2°F |
| Limon | 87.4°F | 88.0°F | 88.5°F |
| Puerto Limon | 87.4°F | 88.0°F | 88.5°F |
| Puerto Viejo de Talamanca | 87.2°F | 87.9°F | 88.4°F |
| Cahuita | 87.1°F | 87.9°F | 88.5°F |
| Tortuguero | 87.1°F | 87.6°F | 88.3°F |
Please see following sea water temperature averages charts for the warmest Costa Rica 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.
Costa Rica Resorts:
NAME
F°
| Alajuela |  |
+66 |
| Cahuita | |
+80 |
| El Roble | |
+78 |
| Heredia |  |
+60 |
| Jaco | |
+82 |
| Limon | |
+80 |
| Playa Flamingo | |
+80 |
| Playas del Coco | |
+80 |
| Puerto Limon | |
+80 |
| Puerto Viejo de Talamanca | |
+80 |
| Samara | |
+76 |
| San Jose | |
+60 |
| Santa Teresa | |
+80 |
| Tamarindo | |
+80 |
| Tortuguero | |
+76 |
