S
M
T
W
T
F
S
30
80°
66°
31
81°
64°
1
81°
63°
2
82°
62°
3
80°
61°
4
78°
60°
5
77°
61°
6
78°
63°
7
79°
64°
8
82°
62°
9
79°
61°
10
79°
61°
11
80°
62°
12
79°
64°
13
81°
66°
14
84°
66°
15
84°
67°
16
83°
68°
17
85°
66°
18
86°
67°
19
83°
66°
20
84°
67°
21
83°
64°
22
82°
62°
23
78°
63°
24
80°
64°
25
84°
65°
26
78°
63°
27
79°
59°
28
Hist. Avg.
80°
62°
29
Hist. Avg.
80°
62°
30
Hist. Avg.
79°
61°
1
Hist. Avg.
79°
61°
2
Hist. Avg.
79°
61°
3
Hist. Avg.
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Seal Beach
Seal Beach's September 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 59° and 68°. The average high for September is 81° with an average low of 64°. 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 Seal Beach. See also: October | November | December.
