Current sea water temperature:
+84.2°F
| Minimum sea water temperature in August: | 86.2°F |
| Maximum sea water temperature in August: | 82.4°F |
| Average sea water temperature in August: | 84.0°F |
| more information | |
14 days
forecast
forecast
| San Juan |
monthly
weather
weather
| San Juan |
Sea water temperature for the last 10 days:
| August 7 | 84.2°F | August 2 | 84.2°F |
| August 6 | 84.4°F | August 1 | 84.4°F |
| August 5 | 84.2°F | July 31 | 84.4°F |
| August 4 | 84.2°F | July 30 | 84.4°F |
| August 3 | 84.4°F | July 29 | 84.4°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
August
August
| 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: 17:18
August 07, friday
1800
84°F
W
15 mph
15 mph
2100
81°F
W
11 mph
11 mph
August 08, saturday
0000
79°F
W
11 mph
11 mph
0300
79°F
W
12 mph
12 mph
0600
77°F
NW
8 mph
8 mph
0900
84°F
W
13 mph
13 mph
1200
88°F
W
16 mph
16 mph
1500
86°F
W
17 mph
17 mph
