Current Sea Water Temperature:
+89.8°F
| Maximum Sea Water Temperature in October: | 92.0°F |
| Minimum Sea Water Temperature in October: | 86.4°F |
| Average water temperature in October: | 88.8°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| October 18 | 89.8°F | October 13 | 89.4°F |
| October 17 | 89.8°F | October 12 | 89.4°F |
| October 16 | 89.6°F | October 11 | 89.4°F |
| October 15 | 89.6°F | October 10 | 89.4°F |
| October 14 | 89.4°F | October 09 | 89.6°F |
When is the Warmest Sea for San Juan?
According to our data for the last three years for San Juan the highest average sea water temperature was in October, September and August.
Average Water Temperature by Month, °F
Sea Water Temperature in October
The average sea surface temperature in October 2026 for San Juan was 89.6°F. The maximum and minimum values were 89.4°F and 90.2°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2026 for San Juan was 89.4°F. The maximum and minimum values were 88.0°F and 90.2°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2026 for San Juan was 88.4°F. The maximum and minimum values were 87.6°F and 89.4°F respectively.
Puerto Rico Resorts:
NAME
F°
| Aguadilla |  |
+84 |
| Arecibo | |
+80 |
| Isabella | |
+80 |
| Mayaguez | |
+84 |
| Ponce | |
+78 |
| San Juan | |
+82 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
San Juan
Local time: 01:57
19 oct, monday
| 0300 |  |
82°F | NW 4 mph |
| 0600 | |
82°F | NW 5 mph |
| 0900 |  |
86°F | NW 4 mph |
| 1200 |  |
90°F | SW 11 mph |
| 1500 |  |
88°F | W 15 mph |
| 1800 | |
86°F | W 12 mph |
| 2100 | |
84°F | NW 7 mph |
20 oct, tuesday
| 0000 | |
82°F | NW 6 mph |