S
M
T
W
T
F
S
30
88°
70°
31
87°
67°
1
87°
66°
2
82°
66°
3
84°
68°
4
87°
70°
5
87°
69°
6
86°
70°
7
87°
69°
8
86°
68°
9
86°
69°
10
81°
70°
11
86°
68°
12
86°
65°
13
81°
67°
14
80°
68°
15
83°
68°
16
84°
67°
17
84°
63°
18
80°
61°
19
79°
61°
20
79°
66°
21
80°
63°
22
81°
61°
23
81°
61°
24
82°
64°
25
83°
65°
26
82°
62°
27
82°
60°
28
79°
62°
29
79°
59°
30
79°
58°
1
Hist. Avg.
80°
58°
2
Hist. Avg.
80°
58°
3
Hist. Avg.
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Onslow Beach
West Onslow Beach's September 2026 forecast shows daily high temperatures ranging from 79° to 88°, with overnight lows between 58° and 70°. The average high for September is 83° with an average low of 65°. 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 West Onslow Beach. See also: October | November | December.