S
M
T
W
T
F
S
26
64°
45°
27
80°
40°
28
78°
55°
29
69°
52°
30
59°
37°
1
61°
35°
2
56°
30°
3
63°
28°
4
77°
42°
5
74°
57°
6
64°
49°
7
64°
39°
8
72°
40°
9
74°
50°
10
74°
49°
11
72°
46°
12
76°
39°
13
75°
46°
14
63°
41°
15
69°
38°
16
86°
49°
17
87°
60°
18
91°
58°
19
89°
65°
20
79°
59°
21
62°
51°
22
69°
57°
23
76°
62°
24
75°
64°
25
77°
59°
26
75°
62°
27
84°
67°
28
82°
59°
29
82°
52°
30
82°
50°
31
80°
47°
1
76°
52°
2
79°
48°
3
84°
52°
4
87°
58°
5
88°
65°
6
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in West Portsmouth
West Portsmouth's May 2026 forecast shows daily high temperatures ranging from 84° to 88°, with overnight lows between 52° and 69°. The average high for May is 86° with an average low of 61°. 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 West Portsmouth. See also: June | July | August.
