The Costa Rica resorts with the warmest sea water temperature at this moment are Playas del Coco, Quepos and Santa Teresa.
Below you can see a list of all popular Costa Rica resorts and information about current sea water temperature and averages for current and next months.
| Resort Name | Current Sea Water Temperature |
September 2025 | October 2025 |
|---|---|---|---|
| Playas del Coco | 91.6°F | 87.6°F | 87.2°F |
| Quepos | 91.2°F | 87.7°F | 86.3°F |
| Santa Teresa | 91.2°F | 87.6°F | 86.5°F |
| El Roble | 91.2°F | 87.5°F | 86.3°F |
| Alajuela | 91.0°F | 87.5°F | 86.5°F |
| Cartago | 91.0°F | 87.6°F | 86.3°F |
| San Jose | 91.0°F | 87.6°F | 86.4°F |
| Playa Flamingo | 91.0°F | 87.5°F | 86.8°F |
| Heredia | 90.8°F | 87.4°F | 86.5°F |
| Jaco | 90.8°F | 87.5°F | 86.5°F |
| Samara | 90.6°F | 87.4°F | 86.5°F |
| Tamarindo | 90.4°F | 87.6°F | 86.7°F |
| Limon | 89.4°F | 88.5°F | 88.9°F |
| Puerto Limon | 89.4°F | 88.5°F | 88.9°F |
| Puerto Viejo de Talamanca | 89.4°F | 88.5°F | 88.8°F |
| Cahuita | 89.4°F | 88.5°F | 88.8°F |
| Tortuguero | 89.0°F | 88.2°F | 88.8°F |
Please see following sea water temperature averages charts for the warmest Costa Rica resorts for more details.
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 |  |
+74 |
| Cahuita |  |
+88 |
| El Roble | |
+86 |
| Heredia | |
+68 |
| Jaco |  |
+86 |
| Limon | |
+88 |
| Playas del Coco | |
+86 |
| Puerto Limon | |
+88 |
| Puerto Viejo de Talamanca | |
+88 |
| Quepos | |
+86 |
| Samara | |
+82 |
| San Jose | |
+68 |
| Santa Teresa | |
+86 |
| Tamarindo | |
+86 |
| Tortuguero | |
+88 |
