S
M
T
W
T
F
S
30
88°
75°
31
90°
75°
1
92°
77°
2
93°
77°
3
87°
77°
4
88°
76°
5
90°
77°
6
91°
77°
7
89°
78°
8
91°
77°
9
90°
76°
10
90°
76°
11
91°
72°
12
90°
75°
13
87°
71°
14
88°
72°
15
87°
75°
16
83°
74°
17
84°
74°
18
84°
73°
19
83°
74°
20
83°
74°
21
84°
73°
22
84°
73°
23
86°
72°
24
85°
73°
25
87°
73°
26
86°
72°
27
85°
73°
28
87°
72°
29
86°
71°
30
83°
72°
1
81°
72°
2
82°
71°
3
82°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Walton Beach
Fort Walton Beach's September 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 71° and 78°. The average high for September is 87° 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 September weather will actually feel in Fort Walton Beach. See also: October | November | December.
