S
M
T
W
T
F
S
26
81°
58°
27
83°
63°
28
80°
72°
29
79°
68°
30
74°
64°
31
82°
69°
1
82°
71°
2
80°
70°
3
80°
67°
4
82°
69°
5
84°
70°
6
83°
71°
7
84°
70°
8
84°
71°
9
86°
70°
10
84°
68°
11
84°
69°
12
83°
67°
13
80°
70°
14
84°
67°
15
79°
64°
16
77°
63°
17
77°
68°
18
78°
66°
19
78°
64°
20
77°
63°
21
77°
69°
22
78°
68°
23
77°
64°
24
77°
62°
25
76°
63°
26
75°
63°
27
76°
62°
28
76°
62°
29
75°
61°
30
75°
63°
31
79°
68°
1
81°
69°
2
80°
68°
3
76°
65°
4
75°
62°
5
74°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fire Island
Fire Island's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 61° and 71°. The average high for August is 79° with an average low of 66°. 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 Fire Island. See also: September | October | November.
