Measurements:
°C
°F
CURRENT WEATHER
13:06
Block Island
56°F
NW 9 mph
Feels like: 54°F
Precip: 69%
World Resorts USA Block Island Weather

7 Day Weather Forecast

05.14
thu
DAY
56°F
NW 9 mph
precip
69%
NIGHT
52°F
NE 4 mph
precip
0%
05.15
fri
DAY
54°F
SW 1 mph
precip
100%
NIGHT
52°F
S 7 mph
precip
69%
05.16
sat
DAY
54°F
NE 14 mph
precip
0%
NIGHT
56°F
NE 19 mph
precip
0%
05.17
sun
DAY
60°F
NE 11 mph
precip
0%
NIGHT
60°F
E 8 mph
precip
0%
05.18
mon
DAY
56°F
W 11 mph
precip
0%
NIGHT
56°F
N 6 mph
precip
0%
05.19
tue
DAY
58°F
NE 11 mph
precip
0%
NIGHT
60°F
NE 20 mph
precip
0%
05.20
wed
DAY
60°F
NE 17 mph
precip
0%
NIGHT
60°F
SE 8 mph
precip
0%

Block Island Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Block Island was 11.1°F. The maximum and minimum values were 7.9°F and 13.0°F respectively.

Block Island on the Weather Map

Best Time to Visit Block Island
The most sunny months:
November 16 days
September 14 days
October 14 days
The most warm months:
July 77.2 °F
August 76.1 °F
September 70.9 °F
Warmest sea temperature:
August 72.3 °F
July 70.7 °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