Current sea water temperature:
+81.0°F
| Minimum sea water temperature in April: | 82.6°F |
| Maximum sea water temperature in April: | 78.6°F |
| Average sea water temperature in April: | 80.2°F |
| more information | |
14 days
forecast
forecast
| San Juan |
monthly
weather
weather
| San Juan |
Sea water temperature for the last 10 days:
| April 26 | 81.0°F | April 21 | 80.8°F |
| April 25 | 80.8°F | April 20 | 81.0°F |
| April 24 | 80.6°F | April 19 | 81.0°F |
| April 23 | 80.6°F | April 18 | 81.0°F |
| April 22 | 80.8°F | April 17 | 81.0°F |
Monthly sea water temperature, °F
When is the warmest sea in San Juan?
Based on the data about daily sea water temperature for the last three years the warmest sea in San Juan was noticed in October, September and August.
Monthly Sea Temperatures in San Juan, °F
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 85.5°F. The highest and lowest sea temperatures during the month were 86.0°F and 84.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 85.7°F. The highest and lowest sea temperatures during the month were 86.4°F and 85.3°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 84.8°F. The highest and lowest sea temperatures during the month were 85.3°F and 84.2°F.
current
weather
weather
| San Juan |
weather in
April
April
| San Juan |
Best time for vacation in San Juan
San Juan on a weather map
Places in Puerto Rico:
Name
°F
24 Hours Forecast
San Juan
Local time: 12:22
April 26, sunday
1500
84°F
W
6 mph
6 mph
1800
81°F
NE
5 mph
5 mph
2100
77°F
N
5 mph
5 mph
April 27, monday
0000
75°F
N
5 mph
5 mph
0300
75°F
N
4 mph
4 mph
0600
75°F
N
4 mph
4 mph
0900
81°F
NW
2 mph
2 mph
1200
84°F
SW
7 mph
7 mph
