S
M
T
W
T
F
S
30
65°
53°
31
70°
49°
1
64°
50°
2
66°
49°
3
64°
56°
4
70°
55°
5
71°
55°
6
71°
54°
7
63°
48°
8
63°
48°
9
64°
51°
10
67°
54°
11
70°
53°
12
70°
55°
13
63°
55°
14
67°
56°
15
64°
54°
16
64°
54°
17
65°
49°
18
64°
54°
19
64°
52°
20
67°
47°
21
65°
46°
22
63°
48°
23
65°
51°
24
68°
50°
25
68°
50°
26
69°
50°
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 63° to 71°, with overnight lows between 46° and 56°. The average high for September is 66° 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.
