S
M
T
W
T
F
S
30
69°
53°
31
70°
56°
1
71°
55°
2
71°
56°
3
70°
51°
4
70°
53°
5
69°
57°
6
71°
55°
7
72°
55°
8
69°
47°
9
64°
53°
10
67°
49°
11
70°
48°
12
69°
47°
13
63°
50°
14
64°
47°
15
63°
45°
16
65°
47°
17
64°
51°
18
62°
46°
19
63°
47°
20
63°
52°
21
66°
50°
22
69°
46°
23
68°
50°
24
66°
51°
25
69°
45°
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 72°, with overnight lows between 45° and 57°. The average high for September is 67° with an average low of 50°. 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.
