S
M
T
W
T
F
S
30
84°
68°
31
87°
70°
1
87°
71°
2
88°
71°
3
85°
72°
4
87°
69°
5
86°
67°
6
83°
68°
7
84°
70°
8
84°
70°
9
83°
69°
10
86°
70°
11
85°
69°
12
86°
69°
13
86°
68°
14
85°
69°
15
86°
69°
16
86°
68°
17
85°
68°
18
85°
67°
19
84°
66°
20
84°
63°
21
83°
66°
22
82°
66°
23
82°
65°
24
84°
61°
25
83°
60°
26
79°
65°
27
82°
64°
28
80°
63°
29
81°
64°
30
81°
64°
1
82°
63°
2
81°
63°
3
77°
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 77° to 88°, with overnight lows between 60° and 72°. 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.
