17.05
sun
sun
Day
84°F
SW 2 mph
Precip.
100%
100%
Night
66°F
SW 4 mph
Precip.
0%
0%
18.05
mon
mon
Day
88°F
SW 2 mph
Precip.
73%
73%
Night
66°F
SW 4 mph
Precip.
0%
0%
19.05
tue
tue
Day
88°F
E 3 mph
Precip.
100%
100%
Night
63°F
SW 4 mph
Precip.
68%
68%
20.05
wed
wed
Day
84°F
E 4 mph
Precip.
100%
100%
Night
66°F
SW 4 mph
Precip.
78%
78%
21.05
thu
thu
Day
79°F
E 2 mph
Precip.
100%
100%
Night
64°F
SW 4 mph
Precip.
0%
0%
22.05
fri
fri
Day
79°F
SE 3 mph
Precip.
100%
100%
Night
63°F
SW 4 mph
Precip.
0%
0%
23.05
sat
sat
Day
79°F
E 1 mph
Precip.
100%
100%
Night
66°F
SW 4 mph
Precip.
85%
85%
sea water
temperature
temperature
| Alajuela |
monthly
weather
weather
| Alajuela |
current
weather
weather
| Alajuela |
14 days
forecast
forecast
| Alajuela |
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 86.2°F. The highest and lowest sea temperatures during the month were 86.9°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 85.3°F and 84.0°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: 15:50
May 17, sunday
1800
70°F
SW
2 mph
2 mph
2100
68°F
SW
4 mph
4 mph
May 18, monday
0000
66°F
SW
4 mph
4 mph
0300
63°F
SW
4 mph
4 mph
0600
64°F
SW
5 mph
5 mph
0900
79°F
SW
4 mph
4 mph
1200
88°F
SW
2 mph
2 mph
1500
79°F
S
1 mph
1 mph
