Average sea water temperature in December:
+83.0°F
| Minimum sea water temperature in December: | 86.4°F |
| Maximum sea water temperature in December: | 80.6°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 82.9°F. The highest and lowest sea temperatures during the month were 83.5°F and 82.4°F.
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| Alajuela |
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| Alajuela |
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| Alajuela |
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| Alajuela |
Monthly sea water temperature in Alajuela, °F
Which Costa Rica resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Quepos | 83.2°F | 83.4°F |
| Cartago | 83.1°F | 83.3°F |
| Santa Teresa | 83.1°F | 82.6°F |
| Jaco | 83.0°F | 83.0°F |
| San Jose | 83.0°F | 83.3°F |
| Heredia | 83.0°F | 83.2°F |
| Alajuela | 82.9°F | 82.8°F |
| El Roble | 82.9°F | 82.1°F |
| Samara | 82.9°F | 82.6°F |
| Limon | 82.6°F | 82.5°F |
| Puerto Limon | 82.6°F | 82.5°F |
| Cahuita | 82.6°F | 82.5°F |
| Puerto Viejo de Talamanca | 82.6°F | 82.6°F |
| Tamarindo | 82.4°F | 81.8°F |
| Tortuguero | 82.3°F | 82.0°F |
| Playas del Coco | 82.1°F | 81.1°F |
| Playa Flamingo | 82.0°F | 81.3°F |
Best time for vacation in Alajuela
Alajuela on a weather map
Places in Costa Rica:
Name
°F
24 Hours Forecast
Alajuela
Local time: 20:11
December 23, tuesday
2100
55°F
SW
6 mph
6 mph
December 24, wednesday
0000
54°F
SW
6 mph
6 mph
0300
54°F
SW
6 mph
6 mph
0600
54°F
SW
6 mph
6 mph
0900
75°F
SW
6 mph
6 mph
1200
82°F
SW
7 mph
7 mph
1500
79°F
SW
7 mph
7 mph
1800
59°F
SW
5 mph
5 mph
