S
M
T
W
T
F
S
30
91°
75°
31
91°
75°
1
90°
74°
2
87°
75°
3
86°
74°
4
86°
74°
5
88°
73°
6
88°
74°
7
87°
73°
8
85°
71°
9
85°
69°
10
84°
69°
11
84°
72°
12
86°
71°
13
88°
72°
14
88°
67°
15
87°
67°
16
82°
66°
17
83°
67°
18
84°
68°
19
86°
67°
20
87°
66°
21
86°
70°
22
85°
70°
23
84°
68°
24
84°
65°
25
83°
65°
26
84°
64°
27
82°
64°
28
85°
68°
29
85°
68°
30
86°
67°
1
85°
67°
2
84°
68°
3
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seabrook
Seabrook's September 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 64° and 75°. The average high for September is 86° with an average low of 69°. 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 Seabrook. See also: October | November | December.
