At this moment warmest sea in Costa Rica was observed in the following locations: San Jose, Jaco, Heredia.
You can find the full list of Costa Rica marine locations in the table below. It shows current sea temperature values and averages for current and upcoming months.
| Place name | Current sea temp |
August 2025 | September 2025 |
|---|---|---|---|
| San Jose | 87.1°F | 84.4°F | 83.8°F |
| Jaco | 87.1°F | 84.5°F | 83.7°F |
| Heredia | 87.1°F | 84.4°F | 83.7°F |
| Cartago | 87.1°F | 84.4°F | 83.9°F |
| Quepos | 87.1°F | 84.3°F | 83.9°F |
| Alajuela | 86.9°F | 84.4°F | 83.7°F |
| El Roble | 86.7°F | 84.2°F | 83.7°F |
| Santa Teresa | 86.7°F | 84.3°F | 83.8°F |
| Samara | 86.5°F | 84.4°F | 83.7°F |
| Tamarindo | 86.2°F | 84.1°F | 83.8°F |
| Playa Flamingo | 85.8°F | 84.0°F | 83.8°F |
| Playas del Coco | 85.6°F | 84.0°F | 83.8°F |
| Puerto Viejo de Talamanca | 83.5°F | 84.1°F | 84.7°F |
| Cahuita | 83.5°F | 84.1°F | 84.6°F |
| Limon | 83.5°F | 84.2°F | 84.6°F |
| Tortuguero | 83.5°F | 83.8°F | 84.4°F |
| Puerto Limon | 83.5°F | 84.2°F | 84.6°F |
Charts below show average sea water temperature for Costa Rica resorts with the warmest sea.
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
