S
M
T
W
T
F
S
26
81°
66°
27
64°
57°
28
75°
63°
29
77°
64°
30
76°
65°
1
70°
62°
2
65°
56°
3
71°
59°
4
73°
65°
5
79°
64°
6
81°
67°
7
80°
58°
8
75°
59°
9
78°
63°
10
76°
62°
11
80°
63°
12
81°
62°
13
82°
63°
14
82°
65°
15
83°
67°
16
84°
67°
17
84°
66°
18
81°
67°
19
81°
67°
20
84°
68°
21
85°
68°
22
85°
69°
23
84°
69°
24
85°
68°
25
84°
69°
26
83°
70°
27
83°
69°
28
81°
70°
29
80°
70°
30
81°
69°
31
82°
70°
1
83°
70°
2
83°
69°
3
82°
71°
4
86°
71°
5
86°
69°
6
81°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hilton Head Island
Hilton Head Island's May 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 56° and 71°. The average high for May is 81° 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 May weather will actually feel in Hilton Head Island. See also: June | July | August.
