World Resorts USA Block Island Weather

Block Island 14 Days Forecast

21.07
tue
Day
73°F
NW 16 mph
Precip.
13%
Night
72°F
N 27 mph
Precip.
52%
22.07
wed
Day
72°F
NE 16 mph
Precip.
49%
Night
70°F
E 6 mph
Precip.
46%
23.07
thu
Day
70°F
SE 14 mph
Precip.
3%
Night
68°F
S 8 mph
Precip.
4%
24.07
fri
Day
68°F
NE 4 mph
Precip.
3%
Night
66°F
NW 9 mph
Precip.
18%
25.07
sat
Day
68°F
W 13 mph
Precip.
5%
Night
68°F
N 6 mph
Precip.
7%
26.07
sun
Day
70°F
NW 6 mph
Precip.
4%
Night
68°F
NE 8 mph
Precip.
6%
27.07
mon
Day
72°F
NE 19 mph
Precip.
12%
Night
70°F
NE 17 mph
Precip.
83%
28.07
tue
Day
72°F
NE 16 mph
Precip.
12%
Night
72°F
N 9 mph
Precip.
17%
29.07
wed
Day
70°F
SW 14 mph
Precip.
12%
Night
70°F
W 7 mph
Precip.
12%
30.07
thu
Day
70°F
W 10 mph
Precip.
11%
Night
68°F
W 7 mph
Precip.
11%
31.07
fri
Day
70°F
W 9 mph
Precip.
9%
Night
70°F
N 7 mph
Precip.
19%
01.08
sat
Day
73°F
NE 19 mph
Precip.
31%
Night
72°F
E 12 mph
Precip.
33%
02.08
sun
Day
73°F
E 11 mph
Precip.
5%
Night
73°F
E 8 mph
Precip.
12%
03.08
mon
Day
73°F
NE 7 mph
Precip.
11%
Night
75°F
NE 12 mph
Precip.
15%

Sea water temperature in July, °F

Show year:
2026
2025
2024

The average sea water temperature in July of 2026 was 66.9°F. The highest and lowest sea temperatures during the month were 68.2°F and 65.5°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.

Air temperature in Block Island, °F

Precipitation total in Block Island, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Block Island

Sunniest months:
November 16 days
September 14 days
June 14 days
Warmest months:
July 74.4 °F
August 73.5 °F
September 68.8 °F
Warmest sea temp:
August 70.1 °F
July 68.4 °F
September 68.3 °F
Coldest months:
January 36.8 °F
February 36.9 °F
December 42.5 °F
Rainiest months:
October 4 days
January 3 days
March 3 days
Windiest months:
December 16.1 mph
January 16.0 mph
November 15.7 mph

Block Island on a weather map

Block Island
+70°F
NW 15 mph
Feels like: +70°F
Precip.: 12%
Places in USA:
Name
°F
+73°F
+81°F
+77°F
+86°F
+66°F
+86°F
+72°F
+84°F
+75°F
+68°F
+55°F
+68°F
+84°F
+79°F
+75°F
24 Hours Forecast
Block Island
Local time: 09:43
July 21, tuesday
1200
73°F
NW
16 mph
1500
73°F
NW
16 mph
1800
70°F
NW
17 mph
2100
72°F
N
19 mph
July 22, wednesday
0000
72°F
N
27 mph
0300
72°F
NE
23 mph
0600
70°F
NE
13 mph
0900
72°F
NE
14 mph
Units of measurement: °C / °F