S
M
T
W
T
F
S
30
78°
66°
31
78°
71°
1
80°
68°
2
73°
66°
3
86°
69°
4
86°
76°
5
81°
69°
6
74°
63°
7
80°
60°
8
82°
65°
9
80°
66°
10
88°
72°
11
79°
67°
12
78°
71°
13
81°
70°
14
78°
59°
15
71°
64°
16
78°
68°
17
82°
69°
18
78°
66°
19
75°
63°
20
73°
62°
21
71°
61°
22
70°
60°
23
71°
61°
24
73°
60°
25
73°
59°
26
68°
55°
27
72°
63°
28
76°
61°
29
76°
60°
30
70°
56°
1
68°
57°
2
70°
61°
3
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Manhattan Beach
Manhattan Beach's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 55° and 71°. The average high for September is 74° with an average low of 62°. 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 Manhattan Beach. See also: October | November | December.
