In December warmest sea in Costa Rica is usually observed in the following locations: Jaco, Quepos, Heredia.
Table below shows the average sea water temperature for marine resorts of Costa Rica in December for the last three years.
| Place name | December 2025 | December 2024 | December 2023 |
|---|---|---|---|
| Jaco | 83.1°F | 83.0°F | 85.0°F |
| Quepos | 83.0°F | 83.4°F | 85.3°F |
| Heredia | 83.0°F | 83.2°F | 85.2°F |
| Cartago | 83.0°F | 83.3°F | 85.2°F |
| San Jose | 83.0°F | 83.3°F | 85.2°F |
| Santa Teresa | 83.0°F | 82.6°F | 84.7°F |
| Alajuela | 83.0°F | 82.8°F | 84.8°F |
| El Roble | 82.9°F | 82.1°F | 84.2°F |
| Samara | 82.9°F | 82.6°F | 84.4°F |
| Limon | 82.8°F | 82.5°F | 83.3°F |
| Puerto Limon | 82.8°F | 82.5°F | 83.3°F |
| Cahuita | 82.7°F | 82.5°F | 83.4°F |
| Puerto Viejo de Talamanca | 82.7°F | 82.6°F | 83.4°F |
| Tamarindo | 82.5°F | 81.8°F | 83.9°F |
| Tortuguero | 82.4°F | 82.0°F | 82.8°F |
| Playa Flamingo | 82.2°F | 81.3°F | 82.8°F |
| Playas del Coco | 82.2°F | 81.1°F | 83.0°F |
Charts below show average sea water temperature for Costa Rica resorts with the warmest sea in December.
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
