In August warmest sea in Costa Rica is usually observed in the following locations: San Jose, Heredia, Cartago.
Table below shows the average sea water temperature for marine resorts of Costa Rica in August for the last three years.
| Place name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| San Jose | 86.9°F | 84.4°F | 84.2°F |
| Heredia | 86.9°F | 84.4°F | 84.1°F |
| Cartago | 86.9°F | 84.4°F | 84.1°F |
| Jaco | 86.8°F | 84.5°F | 84.2°F |
| Santa Teresa | 86.8°F | 84.3°F | 84.4°F |
| Alajuela | 86.8°F | 84.4°F | 84.2°F |
| Quepos | 86.8°F | 84.3°F | 84.0°F |
| Samara | 86.7°F | 84.4°F | 84.6°F |
| El Roble | 86.5°F | 84.2°F | 84.0°F |
| Tamarindo | 86.2°F | 84.1°F | 84.2°F |
| Playa Flamingo | 85.7°F | 84.0°F | 84.2°F |
| Playas del Coco | 85.4°F | 84.0°F | 84.4°F |
| Limon | 83.7°F | 84.2°F | 84.7°F |
| Puerto Limon | 83.7°F | 84.2°F | 84.7°F |
| Puerto Viejo de Talamanca | 83.5°F | 84.1°F | 84.6°F |
| Cahuita | 83.5°F | 84.1°F | 84.6°F |
| Tortuguero | 83.3°F | 83.8°F | 84.5°F |
Charts below show average sea water temperature for Costa Rica resorts with the warmest sea in August.
You can also check other months of the year to see sea temperature of Costa Rica resorts at that time.
Places in Costa Rica:
Name
°F
