Current sea water temperature:
+70.3°F
| Minimum sea water temperature in August: | 74.1°F |
| Maximum sea water temperature in August: | 66.9°F |
| Average sea water temperature in August: | 70.1°F |
| more information | |
14 days
forecast
forecast
| Block Island |
monthly
weather
weather
| Block Island |
Sea water temperature for the last 10 days:
| August 13 | 70.3°F | August 8 | 72.3°F |
| August 12 | 71.6°F | August 7 | 70.3°F |
| August 11 | 72.0°F | August 6 | 69.1°F |
| August 10 | 71.8°F | August 5 | 68.5°F |
| August 9 | 72.3°F | August 4 | 68.9°F |
Monthly sea water temperature, °F
When is the warmest sea in Block Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in Block Island was noticed in August, July and September.
Monthly Sea Temperatures in Block Island, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 69.0°F. The highest and lowest sea temperatures during the month were 71.1°F and 66.9°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 67.3°F. The highest and lowest sea temperatures during the month were 69.3°F and 65.5°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 68.0°F. The highest and lowest sea temperatures during the month were 68.9°F and 66.6°F.
current
weather
weather
| Block Island |
weather in
August
August
| Block Island |
Best time for vacation in Block Island
Block Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Block Island
Local time: 22:24
August 14, friday
0000
72°F
SE
11 mph
11 mph
0300
72°F
SE
11 mph
11 mph
0600
68°F
S
9 mph
9 mph
0900
72°F
SE
6 mph
6 mph
1200
75°F
NE
7 mph
7 mph
1500
77°F
NE
12 mph
12 mph
1800
75°F
NE
11 mph
11 mph
2100
72°F
S
4 mph
4 mph
