S
M
T
W
T
F
S
30
88°
74°
31
88°
73°
1
87°
72°
2
88°
73°
3
84°
69°
4
82°
70°
5
83°
67°
6
82°
67°
7
86°
70°
8
87°
71°
9
87°
72°
10
86°
72°
11
88°
71°
12
88°
71°
13
85°
70°
14
86°
70°
15
86°
69°
16
85°
64°
17
84°
68°
18
81°
62°
19
84°
63°
20
80°
64°
21
80°
67°
22
81°
67°
23
81°
66°
24
84°
61°
25
82°
63°
26
78°
63°
27
78°
61°
28
82°
65°
29
81°
65°
30
82°
63°
1
79°
65°
2
80°
64°
3
81°
64°
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 78° to 88°, with overnight lows between 61° and 74°. The average high for September is 84° with an average low of 67°. 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.
