S
M
T
W
T
F
S
26
89°
75°
27
92°
75°
28
91°
72°
29
91°
74°
30
94°
73°
31
91°
75°
1
91°
76°
2
92°
75°
3
93°
74°
4
95°
76°
5
94°
75°
6
93°
76°
7
91°
76°
8
93°
75°
9
95°
74°
10
94°
75°
11
94°
75°
12
93°
76°
13
91°
73°
14
93°
73°
15
94°
74°
16
95°
74°
17
91°
75°
18
91°
75°
19
93°
76°
20
94°
72°
21
92°
73°
22
93°
73°
23
94°
75°
24
93°
74°
25
91°
73°
26
93°
74°
27
93°
75°
28
92°
75°
29
92°
74°
30
90°
75°
31
90°
75°
1
91°
74°
2
89°
74°
3
88°
73°
4
88°
74°
5
89°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Island
Island's August 2026 forecast shows daily high temperatures ranging from 88° to 95°, with overnight lows between 72° and 76°. The average high for August is 92° with an average low of 74°. 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 Island. See also: September | October | November.
