The Costa Rica resorts with the warmest sea water temperature in October are San Jose, Cartago and Quepos.
Below you can see a list of all popular Costa Rica resorts and information about sea water temperature in October for the last two years.
| Resort Name | October 2026 | October 2025 | October 2024 |
|---|---|---|---|
| San Jose | 90.7°F | 86.4°F | 87.5°F |
| Cartago | 90.7°F | 86.3°F | 87.4°F |
| Quepos | 90.6°F | 86.3°F | 87.4°F |
| El Roble | 90.6°F | 86.3°F | 87.4°F |
| Santa Teresa | 90.6°F | 86.5°F | 87.4°F |
| Tamarindo | 90.5°F | 86.7°F | 87.3°F |
| Heredia | 90.5°F | 86.5°F | 87.4°F |
| Jaco | 90.5°F | 86.5°F | 87.4°F |
| Alajuela | 90.4°F | 86.5°F | 87.3°F |
| Playas del Coco | 90.4°F | 87.2°F | 87.5°F |
| Playa Flamingo | 90.3°F | 86.8°F | 87.3°F |
| Samara | 90.3°F | 86.5°F | 87.2°F |
| Puerto Viejo de Talamanca | 89.1°F | 88.8°F | 89.3°F |
| Cahuita | 89.0°F | 88.8°F | 89.3°F |
| Limon | 89.0°F | 88.9°F | 89.5°F |
| Puerto Limon | 89.0°F | 88.9°F | 89.5°F |
| Tortuguero | 88.8°F | 88.8°F | 88.8°F |
Please see following sea water temperature averages charts for the warmest Costa Rica resorts in October.
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 | |
+84 |
| El Roble | |
+78 |
| Heredia |  |
+64 |
| Jaco |  |
+84 |
| Limon | |
+84 |
| Playas del Coco | |
+82 |
| Puerto Limon | |
+84 |
| Puerto Viejo de Talamanca | |
+84 |
| Quepos | |
+82 |
| Samara | |
+76 |
| San Jose | |
+64 |
| Santa Teresa | |
+86 |
| Tamarindo | |
+82 |
| Tortuguero | |
+80 |
