S
M
T
W
T
F
S
26
70°
34°
27
74°
43°
28
64°
38°
29
49°
38°
30
45°
36°
1
44°
30°
2
49°
25°
3
60°
29°
4
75°
33°
5
53°
40°
6
48°
29°
7
49°
29°
8
62°
29°
9
59°
35°
10
51°
28°
11
50°
27°
12
60°
29°
13
50°
39°
14
63°
32°
15
76°
37°
16
79°
51°
17
67°
44°
18
79°
49°
19
76°
46°
20
52°
36°
21
64°
31°
22
70°
35°
23
73°
49°
24
59°
47°
25
80°
44°
26
82°
54°
27
78°
54°
28
69°
47°
29
71°
43°
30
70°
42°
31
68°
46°
1
75°
48°
2
70°
50°
3
78°
55°
4
79°
53°
5
72°
54°
6
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Eastport
Eastport's May 2026 forecast shows daily high temperatures ranging from 68° to 79°, with overnight lows between 42° and 55°. The average high for May is 72° with an average low of 49°. 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 Eastport. See also: June | July | August.