Current sea water temperature:
+82.9°F
| Minimum sea water temperature in December: | 86.4°F |
| Maximum sea water temperature in December: | 80.4°F |
| Average sea water temperature in December: | 83.2°F |
| more information | |
14 days
forecast
forecast
| San Jose |
monthly
weather
weather
| San Jose |
Sea water temperature for the last 10 days:
| December 21 | 82.9°F | December 16 | 82.4°F |
| December 20 | 83.5°F | December 15 | 82.6°F |
| December 19 | 83.1°F | December 14 | 82.8°F |
| December 18 | 82.9°F | December 13 | 83.1°F |
| December 17 | 82.4°F | December 12 | 83.1°F |
Monthly sea water temperature, °F
When is the warmest sea in San Jose?
Based on the data about daily sea water temperature for the last three years the warmest sea in San Jose was noticed in April, March and May.
Monthly Sea Temperatures in San Jose, °F
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 86.8°F. The highest and lowest sea temperatures during the month were 87.8°F and 86.2°F.
Sea water temperature in March, °F
Show year:
2025
2024
2023
The average sea water temperature in March of 2025 was 86.2°F. The highest and lowest sea temperatures during the month were 87.1°F and 85.3°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 85.9°F. The highest and lowest sea temperatures during the month were 86.7°F and 85.1°F.
current
weather
weather
| San Jose |
weather in
December
December
| San Jose |
Best time for vacation in San Jose
San Jose on a weather map
Places in Costa Rica:
Name
°F
24 Hours Forecast
San Jose
Local time: 11:51
December 21, sunday
1200
77°F
SW
6 mph
6 mph
1500
73°F
SW
6 mph
6 mph
1800
57°F
SW
5 mph
5 mph
2100
54°F
SW
6 mph
6 mph
December 22, monday
0000
52°F
SW
6 mph
6 mph
0300
52°F
W
6 mph
6 mph
0600
52°F
W
6 mph
6 mph
0900
72°F
SW
5 mph
5 mph
