Current Sea Water Temperature:
+90.8°F
| Maximum Sea Water Temperature in August: | 91.6°F |
| Minimum Sea Water Temperature in August: | 85.6°F |
| Average water temperature in August: | 88.0°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 10 | 90.8°F | August 05 | 91.0°F |
| August 09 | 90.6°F | August 04 | 90.6°F |
| August 08 | 91.6°F | August 03 | 90.4°F |
| August 07 | 90.4°F | August 02 | 90.8°F |
| August 06 | 91.0°F | August 01 | 90.6°F |
When is the Warmest Sea for Alajuela?
According to our data for the last three years for Alajuela the highest average sea water temperature was in April, May and March.
Average Water Temperature by Month, °F
Sea Water Temperature in April
The average sea surface temperature in April 2026 for Alajuela was 89.9°F. The maximum and minimum values were 88.8°F and 90.6°F respectively.
Sea Water Temperature in May
The average sea surface temperature in May 2026 for Alajuela was 90.2°F. The maximum and minimum values were 89.6°F and 91.0°F respectively.
Sea Water Temperature in March
The average sea surface temperature in March 2026 for Alajuela was 89.6°F. The maximum and minimum values were 88.8°F and 90.6°F respectively.
Costa Rica Resorts:
NAME
F°
| Alajuela |  |
+62 |
| Cahuita |  |
+80 |
| El Roble |  |
+80 |
| Heredia | |
+58 |
| Jaco | |
+82 |
| Limon |  |
+80 |
| Playa Flamingo | |
+80 |
| Playas del Coco | |
+80 |
| Puerto Limon | |
+80 |
| Puerto Viejo de Talamanca | |
+78 |
| Samara | |
+80 |
| San Jose | |
+58 |
| Santa Teresa | |
+82 |
| Tamarindo | |
+80 |
| Tortuguero | |
+78 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Alajuela
Local time: 02:45
10 aug, monday
| 0300 |  |
62°F | SW 6 mph |
| 0600 |  |
66°F | SW 5 mph |
| 0900 |  |
82°F | SW 6 mph |
| 1200 |  |
88°F | SW 7 mph |
| 1500 | |
84°F | SW 2 mph |
| 1800 | |
70°F | SW 4 mph |
| 2100 | |
68°F | SW 5 mph |
11 aug, tuesday
| 0000 | |
64°F | SW 5 mph |