S
M
T
W
T
F
S
30
78°
60°
31
78°
66°
1
78°
63°
2
69°
61°
3
83°
67°
4
82°
68°
5
78°
62°
6
73°
59°
7
77°
53°
8
78°
58°
9
81°
61°
10
84°
69°
11
77°
59°
12
75°
55°
13
81°
68°
14
76°
56°
15
71°
62°
16
79°
65°
17
82°
65°
18
78°
62°
19
77°
60°
20
73°
59°
21
73°
54°
22
70°
57°
23
70°
57°
24
71°
55°
25
73°
56°
26
74°
55°
27
72°
60°
28
76°
58°
29
76°
57°
30
70°
52°
1
69°
54°
2
71°
58°
3
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sea Cliff
Sea Cliff's September 2026 forecast shows daily high temperatures ranging from 69° to 82°, with overnight lows between 52° and 68°. The average high for September is 74° with an average low of 58°. 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 Sea Cliff. See also: October | November | December.
