Measurements:
°C
°F
CURRENT WEATHER
17:44
Block Island
82°F
NE 14 mph
Feels like: 86°F
Precip: 5%
World Resorts USA Block Island Weather

7 Day Weather Forecast

08.25
tue
DAY
80°F
E 17 mph
precip
4%
NIGHT
70°F
SE 10 mph
precip
9%
08.26
wed
DAY
72°F
NE 11 mph
precip
5%
NIGHT
74°F
E 12 mph
precip
23%
08.27
thu
DAY
76°F
N 11 mph
precip
25%
NIGHT
74°F
N 9 mph
precip
37%
08.28
fri
DAY
76°F
NE 8 mph
precip
11%
NIGHT
74°F
SE 11 mph
precip
27%
08.29
sat
DAY
72°F
NW 2 mph
precip
15%
NIGHT
72°F
NE 6 mph
precip
17%
08.30
sun
DAY
74°F
NE 9 mph
precip
10%
NIGHT
72°F
W 6 mph
precip
74%
08.31
mon
DAY
76°F
E 6 mph
precip
10%
NIGHT
72°F
SE 7 mph
precip
10%

Block Island Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Block Island was 21.2°F. The maximum and minimum values were 20.3°F and 22.4°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
more details