Current sea water temperature:
+85.6°F
| Minimum sea water temperature in October: | 87.8°F |
| Maximum sea water temperature in October: | 82.8°F |
| Average sea water temperature in October: | 84.9°F |
| more information | |
14 days
forecast
forecast
| San Juan |
monthly
weather
weather
| San Juan |
Sea water temperature for the last 10 days:
| October 15 | 85.6°F | October 10 | 85.5°F |
| October 14 | 85.5°F | October 9 | 85.6°F |
| October 13 | 85.5°F | October 8 | 85.6°F |
| October 12 | 85.5°F | October 7 | 85.8°F |
| October 11 | 85.5°F | October 6 | 85.6°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:
2026
2025
2024
The average sea water temperature in October of 2026 was 85.6°F. The highest and lowest sea temperatures during the month were 86.2°F and 85.5°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 85.4°F. The highest and lowest sea temperatures during the month were 86.2°F and 84.2°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 84.5°F. The highest and lowest sea temperatures during the month were 85.5°F and 83.8°F.
current
weather
weather
| San Juan |
weather in
October
October
| 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: 17:52
October 15, thursday
1800
82°F
W
12 mph
12 mph
2100
81°F
W
12 mph
12 mph
October 16, friday
0000
81°F
W
10 mph
10 mph
0300
81°F
W
11 mph
11 mph
0600
81°F
W
8 mph
8 mph
0900
84°F
W
11 mph
11 mph
1200
86°F
W
13 mph
13 mph
1500
86°F
W
16 mph
16 mph
