S
M
T
W
T
F
S
30
86°
72°
31
86°
72°
1
87°
73°
2
85°
73°
3
85°
72°
4
82°
72°
5
82°
69°
6
83°
67°
7
81°
66°
8
82°
68°
9
86°
71°
10
85°
70°
11
88°
64°
12
82°
69°
13
83°
64°
14
82°
63°
15
81°
64°
16
84°
65°
17
85°
67°
18
86°
68°
19
86°
63°
20
85°
61°
21
79°
62°
22
79°
63°
23
80°
66°
24
79°
66°
25
81°
67°
26
81°
66°
27
83°
65°
28
81°
62°
29
83°
64°
30
83°
64°
1
82°
63°
2
82°
64°
3
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Myrtle Beach
Myrtle Beach's September 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 58° and 73°. The average high for September is 83° with an average low of 66°. 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 Myrtle Beach. See also: October | November | December.
