Measurements:
°C
°F
CURRENT WEATHER
15:16
Block Island
84°F
NE 11 mph
Feels like: 86°F
Precip: 3%
World Resorts USA Block Island Weather

7 Day Weather Forecast

08.05
wed
DAY
82°F
NE 10 mph
precip
4%
NIGHT
74°F
NE 11 mph
precip
32%
08.06
thu
DAY
76°F
NE 11 mph
precip
15%
NIGHT
76°F
NE 11 mph
precip
19%
08.07
fri
DAY
78°F
NE 12 mph
precip
15%
NIGHT
76°F
E 6 mph
precip
21%
08.08
sat
DAY
76°F
NE 15 mph
precip
13%
NIGHT
74°F
E 10 mph
precip
50%
08.09
sun
DAY
78°F
NE 13 mph
precip
13%
NIGHT
76°F
NE 16 mph
precip
15%
08.10
mon
DAY
78°F
NE 12 mph
precip
13%
NIGHT
78°F
NE 13 mph
precip
23%
08.11
tue
DAY
78°F
E 16 mph
precip
13%
NIGHT
74°F
W 8 mph
precip
13%

Block Island Sea Water Temperature in August, °F

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Block Island was 20.5°F. The maximum and minimum values were 19.4°F and 21.7°F respectively.

Block Island on the Weather Map

Best Time to Visit Block Island
The most sunny months:
November 16 days
December 14 days
June 14 days
The most warm months:
July 77.6 °F
August 76.1 °F
September 70.9 °F
Warmest sea temperature:
August 72.3 °F
July 70.5 °F
September 70.3 °F
The most cold months:
January 35.4 °F
February 35.4 °F
December 41.7 °F
The most rainy months:
October 4 days
January 3 days
March 3 days
The most windy months:
December 16 mph
January 16 mph
November 16 mph
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