S
M
T
W
T
F
S
26
55°
41°
27
54°
42°
28
54°
40°
29
55°
39°
30
55°
39°
1
56°
45°
2
63°
45°
3
57°
43°
4
56°
42°
5
57°
40°
6
58°
41°
7
57°
43°
8
56°
44°
9
58°
43°
10
58°
41°
11
59°
44°
12
59°
46°
13
61°
44°
14
60°
45°
15
60°
42°
16
61°
42°
17
61°
51°
18
68°
51°
19
64°
50°
20
65°
50°
21
64°
51°
22
64°
45°
23
65°
47°
24
66°
46°
25
64°
47°
26
67°
52°
27
71°
51°
28
72°
53°
29
72°
53°
30
73°
52°
31
67°
53°
1
66°
54°
2
66°
54°
3
67°
52°
4
73°
52°
5
73°
55°
6
72°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oak Bluffs
Oak Bluffs's May 2026 forecast shows daily high temperatures ranging from 54° to 73°, with overnight lows between 39° and 56°. The average high for May is 63° with an average low of 47°. 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 Oak Bluffs. See also: June | July | August.