S
M
T
W
T
F
S
26
91°
76°
27
92°
75°
28
92°
75°
29
93°
74°
30
91°
75°
31
92°
75°
1
91°
76°
2
91°
76°
3
92°
75°
4
91°
76°
5
90°
76°
6
91°
76°
7
90°
76°
8
93°
76°
9
93°
76°
10
92°
74°
11
91°
76°
12
90°
77°
13
Hist. Avg.
92°
75°
14
Hist. Avg.
92°
75°
15
Hist. Avg.
92°
75°
16
Hist. Avg.
92°
75°
17
Hist. Avg.
92°
75°
18
Hist. Avg.
92°
75°
19
Hist. Avg.
92°
75°
20
Hist. Avg.
92°
75°
21
Hist. Avg.
92°
75°
22
Hist. Avg.
92°
75°
23
Hist. Avg.
92°
75°
24
Hist. Avg.
91°
75°
25
Hist. Avg.
91°
75°
26
Hist. Avg.
91°
75°
27
Hist. Avg.
91°
75°
28
Hist. Avg.
91°
75°
29
Hist. Avg.
91°
75°
30
Hist. Avg.
91°
75°
31
Hist. Avg.
91°
75°
1
Hist. Avg.
91°
75°
2
Hist. Avg.
91°
75°
3
Hist. Avg.
91°
75°
4
Hist. Avg.
91°
75°
5
Hist. Avg.
91°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Sanibel
Sanibel's August 2026 forecast shows daily high temperatures ranging from 90° to 93°, with overnight lows between 74° and 77°. The average high for August is 91° with an average low of 76°. 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 Sanibel. See also: September | October | November.
