S
M
T
W
T
F
S
30
89°
74°
31
94°
75°
1
92°
76°
2
92°
76°
3
91°
76°
4
92°
78°
5
91°
78°
6
91°
76°
7
90°
77°
8
88°
77°
9
95°
76°
10
94°
74°
11
93°
75°
12
92°
76°
13
88°
82°
14
89°
80°
15
89°
80°
16
90°
78°
17
90°
80°
18
89°
75°
19
88°
76°
20
86°
75°
21
85°
76°
22
88°
75°
23
86°
76°
24
86°
73°
25
87°
75°
26
86°
74°
27
84°
76°
28
84°
76°
29
82°
76°
30
85°
75°
1
85°
75°
2
84°
74°
3
84°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Captiva
Captiva's September 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 73° and 82°. The average high for September is 86° 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.
