18.12
thu
thu
Day
77°F
SE 2 mph
Precip.
61%
61%
Night
55°F
W 4 mph
Precip.
0%
0%
19.12
fri
fri
Day
79°F
SW 4 mph
Precip.
0%
0%
Night
57°F
SW 6 mph
Precip.
0%
0%
20.12
sat
sat
Day
77°F
SW 6 mph
Precip.
0%
0%
Night
54°F
SW 6 mph
Precip.
0%
0%
21.12
sun
sun
Day
77°F
SW 6 mph
Precip.
0%
0%
Night
54°F
SW 6 mph
Precip.
0%
0%
22.12
mon
mon
Day
77°F
SW 5 mph
Precip.
0%
0%
Night
54°F
W 6 mph
Precip.
0%
0%
23.12
tue
tue
Day
77°F
SW 5 mph
Precip.
0%
0%
Night
54°F
W 5 mph
Precip.
0%
0%
24.12
wed
wed
Day
75°F
SW 4 mph
Precip.
100%
100%
Night
55°F
SW 6 mph
Precip.
0%
0%
25.12
thu
thu
Day
77°F
SW 5 mph
Precip.
74%
74%
Night
55°F
SW 6 mph
Precip.
0%
0%
26.12
fri
fri
Day
75°F
SW 4 mph
Precip.
100%
100%
Night
55°F
SW 6 mph
Precip.
0%
0%
27.12
sat
sat
Day
77°F
SW 6 mph
Precip.
82%
82%
Night
54°F
SW 6 mph
Precip.
74%
74%
28.12
sun
sun
Day
73°F
SW 4 mph
Precip.
100%
100%
Night
52°F
W 5 mph
Precip.
0%
0%
29.12
mon
mon
Day
79°F
SW 2 mph
Precip.
0%
0%
Night
52°F
W 4 mph
Precip.
0%
0%
30.12
tue
tue
Day
79°F
SW 2 mph
Precip.
66%
66%
Night
54°F
SW 6 mph
Precip.
0%
0%
31.12
wed
wed
Day
79°F
SW 2 mph
Precip.
0%
0%
Night
57°F
SW 5 mph
Precip.
0%
0%
sea water
temperature
temperature
| San Jose |
monthly
weather
weather
| San Jose |
current
weather
weather
| San Jose |
7 days
forecast
forecast
| San Jose |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 83.0°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.4°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 83.9°F. The highest and lowest sea temperatures during the month were 85.3°F and 82.0°F.
Air temperature in San Jose, °F
Precipitation total in San Jose, in.
* Charts above show average data for the last 3 years.
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: 19:55
December 18, thursday
2100
57°F
SW
4 mph
4 mph
December 19, friday
0000
55°F
W
4 mph
4 mph
0300
52°F
W
5 mph
5 mph
0600
52°F
W
5 mph
5 mph
0900
73°F
SW
4 mph
4 mph
1200
79°F
SW
4 mph
4 mph
1500
73°F
SW
4 mph
4 mph
1800
59°F
SW
5 mph
5 mph
