S
M
T
W
T
F
S
30
81°
61°
31
82°
74°
1
88°
70°
2
80°
74°
3
90°
74°
4
87°
72°
5
80°
68°
6
78°
64°
7
80°
65°
8
81°
64°
9
82°
68°
10
88°
66°
11
83°
66°
12
79°
68°
13
79°
66°
14
81°
65°
15
79°
62°
16
75°
67°
17
74°
65°
18
73°
64°
19
73°
62°
20
74°
65°
21
75°
65°
22
75°
64°
23
74°
64°
24
74°
63°
25
73°
64°
26
76°
64°
27
77°
63°
28
77°
61°
29
70°
59°
30
70°
60°
1
71°
61°
2
70°
60°
3
68°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sea Dunes
Sea Dunes's September 2026 forecast shows daily high temperatures ranging from 68° to 90°, with overnight lows between 58° and 74°. The average high for September is 77° with an average low of 65°. 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 Sea Dunes. See also: October | November | December.
