S
M
T
W
T
F
S
26
53°
38°
27
66°
37°
28
60°
38°
29
55°
43°
30
52°
46°
1
58°
43°
2
52°
44°
3
57°
37°
4
62°
36°
5
63°
48°
6
62°
52°
7
65°
45°
8
61°
45°
9
57°
47°
10
60°
51°
11
62°
44°
12
60°
44°
13
59°
48°
14
56°
49°
15
62°
47°
16
67°
42°
17
74°
56°
18
73°
55°
19
72°
57°
20
85°
59°
21
66°
51°
22
65°
50°
23
58°
48°
24
56°
49°
25
67°
56°
26
73°
53°
27
76°
56°
28
75°
56°
29
72°
51°
30
53°
40°
31
69°
51°
1
64°
44°
2
67°
49°
3
69°
50°
4
70°
58°
5
75°
62°
6
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mystic Seaport
Mystic Seaport's May 2026 forecast shows daily high temperatures ranging from 53° to 77°, with overnight lows between 40° and 62°. The average high for May is 68° with an average low of 52°. 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 Mystic Seaport. See also: June | July | August.
