Current sea water temperature:
+86.5°F
| Minimum sea water temperature in September: | 87.4°F |
| Maximum sea water temperature in September: | 82.2°F |
| Average sea water temperature in September: | 83.8°F |
| more information | |
14 days
forecast
forecast
| San Jose |
monthly
weather
weather
| San Jose |
Sea water temperature for the last 10 days:
| September 16 | 86.5°F | September 11 | 86.4°F |
| September 15 | 86.2°F | September 10 | 86.7°F |
| September 14 | 86.2°F | September 9 | 86.5°F |
| September 13 | 86.2°F | September 8 | 85.6°F |
| September 12 | 85.8°F | September 7 | 86.2°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:
2026
2025
2024
The average sea water temperature in April of 2026 was 86.6°F. The highest and lowest sea temperatures during the month were 87.4°F and 85.5°F.
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 86.3°F. The highest and lowest sea temperatures during the month were 87.3°F and 85.5°F.
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.
current
weather
weather
| San Jose |
weather in
September
September
| 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: 07:23
September 16, wednesday
0900
68°F
SW
5 mph
5 mph
1200
72°F
SW
6 mph
6 mph
1500
64°F
SW
5 mph
5 mph
1800
63°F
SW
4 mph
4 mph
2100
61°F
W
6 mph
6 mph
September 17, thursday
0000
59°F
W
4 mph
4 mph
0300
59°F
W
5 mph
5 mph
0600
59°F
SW
4 mph
4 mph
