In October warmest sea in Costa Rica is usually observed in the following locations: Cartago, San Jose, Quepos.
Table below shows the average sea water temperature for marine resorts of Costa Rica in October for the last three years.
| Place name | October 2026 | October 2025 | October 2024 |
|---|---|---|---|
| Cartago | 86.7°F | 82.6°F | 83.7°F |
| San Jose | 86.7°F | 82.8°F | 83.7°F |
| Quepos | 86.7°F | 82.7°F | 83.6°F |
| El Roble | 86.6°F | 82.7°F | 83.6°F |
| Heredia | 86.6°F | 82.9°F | 83.7°F |
| Santa Teresa | 86.6°F | 82.9°F | 83.7°F |
| Jaco | 86.5°F | 82.9°F | 83.6°F |
| Alajuela | 86.5°F | 82.8°F | 83.6°F |
| Tamarindo | 86.4°F | 83.0°F | 83.6°F |
| Playas del Coco | 86.4°F | 83.5°F | 83.7°F |
| Playa Flamingo | 86.4°F | 83.1°F | 83.6°F |
| Samara | 86.3°F | 82.9°F | 83.5°F |
| Puerto Viejo de Talamanca | 85.1°F | 85.0°F | 85.4°F |
| Cahuita | 85.1°F | 84.9°F | 85.4°F |
| Limon | 85.0°F | 85.0°F | 85.6°F |
| Puerto Limon | 85.0°F | 85.0°F | 85.6°F |
| Tortuguero | 84.8°F | 84.9°F | 84.9°F |
Charts below show average sea water temperature for Costa Rica resorts with the warmest sea in October.
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
