S
M
T
W
T
F
S
30
70°
56°
31
70°
56°
1
69°
52°
2
69°
51°
3
68°
53°
4
68°
55°
5
66°
48°
6
64°
54°
7
67°
55°
8
70°
56°
9
71°
55°
10
64°
48°
11
62°
49°
12
67°
52°
13
69°
55°
14
71°
54°
15
70°
52°
16
64°
48°
17
63°
50°
18
68°
50°
19
63°
49°
20
70°
52°
21
Hist. Avg.
67°
50°
22
Hist. Avg.
67°
50°
23
Hist. Avg.
67°
49°
24
Hist. Avg.
66°
49°
25
Hist. Avg.
66°
49°
26
Hist. Avg.
66°
49°
27
Hist. Avg.
66°
49°
28
Hist. Avg.
65°
48°
29
Hist. Avg.
65°
48°
30
Hist. Avg.
65°
48°
1
Hist. Avg.
65°
48°
2
Hist. Avg.
64°
48°
3
Hist. Avg.
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Seaside
Seaside's September 2026 forecast shows daily high temperatures ranging from 62° to 71°, with overnight lows between 48° and 56°. The average high for September is 67° with an average low of 52°. 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 Seaside. See also: October | November | December.
