S
M
T
W
T
F
S
30
89°
76°
31
88°
77°
1
89°
76°
2
88°
77°
3
89°
77°
4
88°
76°
5
88°
77°
6
88°
76°
7
87°
76°
8
88°
77°
9
89°
76°
10
89°
76°
11
88°
75°
12
89°
73°
13
89°
76°
14
88°
77°
15
87°
75°
16
89°
76°
17
88°
75°
18
87°
76°
19
88°
75°
20
87°
75°
21
88°
76°
22
88°
77°
23
87°
77°
24
Hist. Avg.
90°
74°
25
Hist. Avg.
89°
74°
26
Hist. Avg.
89°
74°
27
Hist. Avg.
89°
74°
28
Hist. Avg.
89°
73°
29
Hist. Avg.
89°
73°
30
Hist. Avg.
89°
73°
1
Hist. Avg.
89°
73°
2
Hist. Avg.
89°
73°
3
Hist. Avg.
89°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Captiva
Captiva's September 2026 forecast shows daily high temperatures ranging from 87° to 89°, with overnight lows between 73° and 77°. The average high for September is 88° 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 September weather will actually feel in Captiva. See also: October | November | December.
