In September warmest sea in Costa Rica is usually observed in the following locations: Puerto Viejo de Talamanca, Limon, Puerto Limon.
Table below shows the average sea water temperature for marine resorts of Costa Rica in September for the last three years.
| Place name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Puerto Viejo de Talamanca | 84.7°F | 85.7°F | 85.7°F |
| Limon | 84.6°F | 86.0°F | 85.8°F |
| Puerto Limon | 84.6°F | 86.0°F | 85.8°F |
| Cahuita | 84.6°F | 85.7°F | 85.6°F |
| Tortuguero | 84.4°F | 85.8°F | 85.6°F |
| Quepos | 83.9°F | 84.1°F | 85.6°F |
| Cartago | 83.9°F | 84.1°F | 85.7°F |
| Playas del Coco | 83.8°F | 84.9°F | 86.2°F |
| Santa Teresa | 83.8°F | 84.0°F | 85.8°F |
| Tamarindo | 83.8°F | 84.4°F | 86.3°F |
| San Jose | 83.8°F | 84.2°F | 85.8°F |
| Playa Flamingo | 83.8°F | 84.7°F | 86.0°F |
| Jaco | 83.7°F | 84.1°F | 85.7°F |
| Alajuela | 83.7°F | 84.0°F | 85.6°F |
| El Roble | 83.7°F | 84.1°F | 85.6°F |
| Heredia | 83.7°F | 84.1°F | 85.6°F |
| Samara | 83.7°F | 84.2°F | 86.3°F |
Charts below show average sea water temperature for Costa Rica resorts with the warmest sea in September.
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
