Current sea water temperature:
+43.9°F
| Minimum sea water temperature in December: | 55.0°F |
| Maximum sea water temperature in December: | 43.5°F |
| Average sea water temperature in December: | 49.9°F |
| more information | |
14 days
forecast
forecast
| Block Island |
monthly
weather
weather
| Block Island |
Sea water temperature for the last 10 days:
| December 30 | 43.9°F | December 25 | 44.4°F |
| December 29 | 44.1°F | December 24 | 44.8°F |
| December 28 | 43.5°F | December 23 | 45.0°F |
| December 27 | 44.6°F | December 22 | 45.5°F |
| December 26 | 44.2°F | December 21 | 46.0°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: 15:03
December 30, tuesday
1800
30°F
E
37 mph
37 mph
2100
32°F
E
34 mph
34 mph
December 31, wednesday
0000
32°F
E
32 mph
32 mph
0300
32°F
E
28 mph
28 mph
0600
32°F
E
24 mph
24 mph
0900
32°F
E
23 mph
23 mph
1200
32°F
E
24 mph
24 mph
1500
34°F
E
25 mph
25 mph
