Current sea water temperature:
+37.8°F
| Minimum sea water temperature in March: | 45.7°F |
| Maximum sea water temperature in March: | 35.2°F |
| Average sea water temperature in March: | 41.3°F |
| more information | |
14 days
forecast
forecast
| Block Island |
monthly
weather
weather
| Block Island |
Sea water temperature for the last 10 days:
| March 18 | 37.8°F | March 13 | 38.7°F |
| March 17 | 37.0°F | March 12 | 38.5°F |
| March 16 | 37.2°F | March 11 | 37.6°F |
| March 15 | 37.2°F | March 10 | 37.4°F |
| March 14 | 37.2°F | March 9 | 37.2°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
March
March
| 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: 21:39
March 19, thursday
0000
30°F
N
7 mph
7 mph
0300
30°F
NW
4 mph
4 mph
0600
32°F
W
6 mph
6 mph
0900
34°F
NW
9 mph
9 mph
1200
36°F
NW
11 mph
11 mph
1500
37°F
N
9 mph
9 mph
1800
37°F
NE
9 mph
9 mph
2100
37°F
NE
9 mph
9 mph
