The Costa Rica resorts with the warmest sea water temperature at this moment are Samara, Santa Teresa and Heredia.
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 |
|---|---|---|---|
| Samara | 91.2°F | 87.4°F | 86.5°F |
| Santa Teresa | 91.0°F | 87.6°F | 86.5°F |
| Heredia | 90.6°F | 87.4°F | 86.5°F |
| Alajuela | 90.4°F | 87.5°F | 86.5°F |
| Jaco | 90.4°F | 87.5°F | 86.5°F |
| El Roble | 90.4°F | 87.5°F | 86.3°F |
| San Jose | 90.2°F | 87.6°F | 86.4°F |
| Playas del Coco | 90.0°F | 87.6°F | 87.2°F |
| Cartago | 89.8°F | 87.6°F | 86.3°F |
| Tamarindo | 89.8°F | 87.6°F | 86.7°F |
| Playa Flamingo | 89.8°F | 87.5°F | 86.8°F |
| Quepos | 89.4°F | 87.7°F | 86.3°F |
| Puerto Viejo de Talamanca | 88.6°F | 88.5°F | 88.8°F |
| Cahuita | 88.4°F | 88.5°F | 88.8°F |
| Limon | 88.2°F | 88.5°F | 88.9°F |
| Puerto Limon | 88.2°F | 88.5°F | 88.9°F |
| Tortuguero | 88.0°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 |  |
+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 |
