S
M
T
W
T
F
S
30
86°
72°
31
87°
72°
1
87°
73°
2
85°
73°
3
85°
72°
4
87°
73°
5
87°
73°
6
86°
72°
7
87°
72°
8
86°
71°
9
87°
72°
10
88°
73°
11
87°
72°
12
86°
71°
13
84°
71°
14
82°
70°
15
86°
71°
16
86°
71°
17
85°
70°
18
85°
69°
19
84°
68°
20
79°
66°
21
79°
63°
22
85°
68°
23
82°
67°
24
80°
66°
25
78°
61°
26
82°
64°
27
84°
66°
28
85°
67°
29
84°
66°
30
85°
64°
1
85°
58°
2
80°
56°
3
76°
61°
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 76° to 88°, with overnight lows between 56° and 73°. The average high for September is 84° with an average low of 68°. 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.
