26.08
wed
wed
Day
86°F
W 2 mph
Precip.
21%
21%
Night
66°F
SW 3 mph
Precip.
29%
29%
27.08
thu
thu
Day
82°F
E 2 mph
Precip.
44%
44%
Night
66°F
SW 4 mph
Precip.
31%
31%
28.08
fri
fri
Day
82°F
SW 8 mph
Precip.
6%
6%
Night
66°F
SW 4 mph
Precip.
26%
26%
29.08
sat
sat
Day
79°F
NE 1 mph
Precip.
57%
57%
Night
66°F
SW 3 mph
Precip.
40%
40%
30.08
sun
sun
Day
79°F
W 1 mph
Precip.
57%
57%
Night
66°F
SW 2 mph
Precip.
26%
26%
31.08
mon
mon
Day
82°F
SE 3 mph
Precip.
36%
36%
Night
64°F
SW 4 mph
Precip.
31%
31%
01.09
tue
tue
Day
79°F
NE 5 mph
Precip.
14%
14%
Night
64°F
SW 2 mph
Precip.
38%
38%
sea water
temperature
temperature
| Alajuela |
monthly
weather
weather
| Alajuela |
current
weather
weather
| Alajuela |
14 days
forecast
forecast
| Alajuela |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 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 September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 83.7°F. The highest and lowest sea temperatures during the month were 84.2°F and 83.1°F.
Air temperature in Alajuela, °F
Precipitation total in Alajuela, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Alajuela
Alajuela on a weather map
Places in Costa Rica:
Name
°F
24 Hours Forecast
Alajuela
Local time: 21:40
August 27, thursday
0000
66°F
SW
3 mph
3 mph
0300
66°F
SW
4 mph
4 mph
0600
66°F
SW
4 mph
4 mph
0900
79°F
SW
3 mph
3 mph
1200
82°F
E
2 mph
2 mph
1500
77°F
NE
2 mph
2 mph
1800
70°F
S
2 mph
2 mph
2100
68°F
SW
4 mph
4 mph
