Average sea water temperature in September:
+83.9°F
| Minimum sea water temperature in September: | 86.9°F |
| Maximum sea water temperature in September: | 82.2°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 86.4°F. The highest and lowest sea temperatures during the month were 86.9°F and 85.3°F.
Monthly sea water temperature in Cartago, °F
Which Costa Rica resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Samara | 86.7°F | 83.7°F |
| Santa Teresa | 86.6°F | 83.8°F |
| Tamarindo | 86.6°F | 83.8°F |
| San Jose | 86.5°F | 83.8°F |
| Heredia | 86.4°F | 83.7°F |
| Cartago | 86.4°F | 83.9°F |
| Jaco | 86.4°F | 83.7°F |
| Alajuela | 86.3°F | 83.7°F |
| Playa Flamingo | 86.3°F | 83.8°F |
| El Roble | 86.2°F | 83.7°F |
| Quepos | 86.2°F | 83.9°F |
| Playas del Coco | 86.0°F | 83.8°F |
| Limon | 84.2°F | 84.6°F |
| Puerto Limon | 84.2°F | 84.6°F |
| Puerto Viejo de Talamanca | 83.9°F | 84.7°F |
| Cahuita | 83.9°F | 84.6°F |
| Tortuguero | 83.8°F | 84.4°F |
Best time for vacation in Cartago
Cartago on a weather map
Places in Costa Rica:
Name
°F
24 Hours Forecast
Cartago
Local time: 09:01
September 16, wednesday
1200
73°F
SW
2 mph
2 mph
1500
66°F
SW
4 mph
4 mph
1800
61°F
SW
5 mph
5 mph
2100
61°F
SW
7 mph
7 mph
September 17, thursday
0000
59°F
SW
6 mph
6 mph
0300
59°F
SW
6 mph
6 mph
0600
61°F
W
6 mph
6 mph
0900
72°F
SW
4 mph
4 mph
