17.05
sun
sun
Day
81°F
SW 3 mph
Precip.
100%
100%
Night
64°F
SW 5 mph
Precip.
0%
0%
18.05
mon
mon
Day
82°F
SW 4 mph
Precip.
100%
100%
Night
64°F
SW 4 mph
Precip.
0%
0%
19.05
tue
tue
Day
82°F
S 2 mph
Precip.
100%
100%
Night
61°F
SW 4 mph
Precip.
0%
0%
20.05
wed
wed
Day
79°F
S 2 mph
Precip.
100%
100%
Night
66°F
SW 4 mph
Precip.
73%
73%
21.05
thu
thu
Day
75°F
SE 2 mph
Precip.
100%
100%
Night
61°F
SW 4 mph
Precip.
81%
81%
22.05
fri
fri
Day
75°F
S 2 mph
Precip.
100%
100%
Night
61°F
SW 4 mph
Precip.
0%
0%
23.05
sat
sat
Day
75°F
S 1 mph
Precip.
100%
100%
Night
64°F
SW 4 mph
Precip.
84%
84%
sea water
temperature
temperature
| San Jose |
monthly
weather
weather
| San Jose |
current
weather
weather
| San Jose |
14 days
forecast
forecast
| San Jose |
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 86.6°F. The highest and lowest sea temperatures during the month were 87.4°F and 85.6°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 84.6°F. The highest and lowest sea temperatures during the month were 85.6°F and 84.0°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: 15:50
May 17, sunday
1800
68°F
SW
3 mph
3 mph
2100
68°F
SW
4 mph
4 mph
May 18, monday
0000
64°F
SW
5 mph
5 mph
0300
61°F
SW
5 mph
5 mph
0600
63°F
SW
6 mph
6 mph
0900
75°F
SW
4 mph
4 mph
1200
82°F
SW
4 mph
4 mph
1500
77°F
S
4 mph
4 mph
