S
M
T
W
T
F
S
26
73°
60°
27
75°
60°
28
77°
68°
29
73°
66°
30
70°
65°
31
78°
62°
1
78°
67°
2
78°
70°
3
75°
67°
4
80°
62°
5
80°
65°
6
81°
72°
7
86°
72°
8
81°
70°
9
85°
71°
10
82°
67°
11
81°
70°
12
82°
69°
13
78°
64°
14
78°
66°
15
77°
64°
16
79°
62°
17
70°
64°
18
77°
67°
19
82°
70°
20
81°
66°
21
67°
64°
22
68°
65°
23
76°
65°
24
79°
65°
25
76°
61°
26
76°
62°
27
78°
67°
28
81°
69°
29
76°
64°
30
79°
64°
31
72°
65°
1
70°
61°
2
70°
63°
3
78°
68°
4
82°
67°
5
74°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Block Island
Block Island's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Block Island. See also: September | October | November.
