Current Sea Water Temperature:
+91.0°F
| Maximum Sea Water Temperature in September: | 91.6°F |
| Minimum Sea Water Temperature in September: | 85.8°F |
| Average water temperature in September: | 87.7°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| September 28 | 91.0°F | September 23 | 90.6°F |
| September 27 | 90.2°F | September 22 | 90.2°F |
| September 26 | 90.4°F | September 21 | 90.4°F |
| September 25 | 90.4°F | September 20 | 90.4°F |
| September 24 | 90.4°F | September 19 | 90.6°F |
When is the Warmest Sea for San Jose?
According to our data for the last three years for San Jose the highest average sea water temperature was in April, March and May.
Average Water Temperature by Month, °F
Sea Water Temperature in April
The average sea surface temperature in April 2026 for San Jose was 90.7°F. The maximum and minimum values were 89.4°F and 91.6°F respectively.
Sea Water Temperature in March
The average sea surface temperature in March 2026 for San Jose was 90.3°F. The maximum and minimum values were 89.4°F and 91.4°F respectively.
Sea Water Temperature in May
The average sea surface temperature in May 2026 for San Jose was 90.7°F. The maximum and minimum values were 89.6°F and 91.6°F respectively.
Costa Rica Resorts:
NAME
F°
| Alajuela |  |
+74 |
| Cahuita |  |
+88 |
| El Roble | |
+86 |
| Heredia | |
+68 |
| Jaco |  |
+86 |
| Limon | |
+88 |
| Playas del Coco | |
+86 |
| Puerto Limon | |
+88 |
| Puerto Viejo de Talamanca | |
+88 |
| Quepos | |
+86 |
| Samara | |
+82 |
| San Jose | |
+68 |
| Santa Teresa | |
+86 |
| Tamarindo | |
+86 |
| Tortuguero | |
+88 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
San Jose
Local time: 15:58
28 sep, monday
| 1800 |  |
66°F | SW 2 mph |
| 2100 |  |
64°F | SW 3 mph |
29 sep, tuesday
| 0000 |  |
62°F | W 2 mph |
| 0300 | |
60°F | W 2 mph |
| 0600 |  |
62°F | W 4 mph |
| 0900 | |
74°F | SW 3 mph |
| 1200 | |
72°F | S 4 mph |
| 1500 | |
70°F | SE 2 mph |