S
M
T
W
T
F
S
26
79°
67°
27
81°
69°
28
81°
69°
29
78°
68°
30
82°
66°
31
77°
63°
1
76°
63°
2
76°
65°
3
77°
67°
4
79°
69°
5
82°
68°
6
79°
65°
7
81°
67°
8
83°
68°
9
83°
68°
10
82°
61°
11
80°
60°
12
79°
63°
13
77°
61°
14
80°
61°
15
77°
62°
16
77°
65°
17
75°
65°
18
76°
62°
19
76°
60°
20
77°
60°
21
77°
61°
22
79°
66°
23
79°
66°
24
82°
65°
25
82°
59°
26
81°
58°
27
75°
58°
28
75°
60°
29
74°
62°
30
75°
63°
31
74°
64°
1
80°
61°
2
75°
61°
3
77°
59°
4
74°
58°
5
73°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fishers Island
Fishers Island's August 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 58° and 69°. The average high for August is 78° with an average low of 63°. 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 Fishers Island. See also: September | October | November.
