Current sea water temperature:
+39.9°F
| Minimum sea water temperature in January: | 49.5°F |
| Maximum sea water temperature in January: | 39.9°F |
| Average sea water temperature in January: | 44.5°F |
| more information | |
14 days
forecast
forecast
| Block Island |
monthly
weather
weather
| Block Island |
Sea water temperature for the last 10 days:
| January 11 | 39.9°F | January 6 | 41.2°F |
| January 10 | 41.0°F | January 5 | 41.7°F |
| January 9 | 41.2°F | January 4 | 41.4°F |
| January 8 | 41.2°F | January 3 | 41.4°F |
| January 7 | 41.4°F | January 2 | 41.5°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:
2025
2024
2023
The average sea water temperature in July of 2025 was 68.5°F. The highest and lowest sea temperatures during the month were 71.6°F and 65.1°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
January
January
| 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: 17:37
January 11, sunday
1800
43°F
SE
19 mph
19 mph
2100
39°F
E
23 mph
23 mph
January 12, monday
0000
37°F
E
29 mph
29 mph
0300
34°F
E
33 mph
33 mph
0600
32°F
SE
29 mph
29 mph
0900
32°F
E
28 mph
28 mph
1200
36°F
E
24 mph
24 mph
1500
39°F
E
19 mph
19 mph
