S
M
T
W
T
F
S
26
87°
73°
27
89°
76°
28
91°
76°
29
91°
75°
30
90°
76°
31
91°
77°
1
91°
76°
2
89°
76°
3
87°
75°
4
90°
76°
5
90°
76°
6
89°
75°
7
91°
76°
8
90°
76°
9
91°
77°
10
91°
76°
11
90°
75°
12
88°
76°
13
88°
76°
14
89°
75°
15
87°
74°
16
84°
73°
17
84°
74°
18
85°
74°
19
86°
75°
20
86°
75°
21
87°
74°
22
87°
75°
23
86°
75°
24
89°
72°
25
90°
74°
26
90°
72°
27
89°
71°
28
90°
70°
29
89°
72°
30
89°
74°
31
88°
74°
1
89°
73°
2
85°
74°
3
85°
73°
4
86°
73°
5
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hilton Head Island
Hilton Head Island's August 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 70° and 77°. The average high for August is 88° with an average low of 74°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Hilton Head Island. See also: September | October | November.
