S
M
T
W
T
F
S
30
89°
74°
31
90°
73°
1
91°
75°
2
91°
73°
3
90°
73°
4
84°
73°
5
88°
73°
6
88°
75°
7
90°
75°
8
90°
73°
9
91°
73°
10
86°
75°
11
86°
77°
12
86°
73°
13
90°
73°
14
91°
75°
15
93°
73°
16
90°
69°
17
91°
65°
18
91°
71°
19
91°
72°
20
88°
71°
21
87°
70°
22
86°
69°
23
87°
71°
24
90°
68°
25
87°
64°
26
87°
66°
27
86°
67°
28
87°
67°
29
84°
60°
30
86°
66°
1
86°
65°
2
81°
65°
3
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seacliff
Seacliff's September 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 60° and 72°. The average high for September is 87° with an average low of 67°. 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 Seacliff. See also: October | November | December.
