S
M
T
W
T
F
S
29
52°
30°
30
57°
39°
31
66°
46°
1
55°
48°
2
54°
41°
3
59°
48°
4
55°
43°
5
54°
34°
6
55°
30°
7
68°
36°
8
73°
45°
9
66°
43°
10
52°
37°
11
55°
46°
12
57°
37°
13
54°
32°
14
55°
32°
15
59°
51°
16
58°
51°
17
59°
49°
18
60°
43°
19
59°
43°
20
57°
44°
21
57°
41°
22
58°
43°
23
59°
42°
24
56°
42°
25
57°
44°
26
57°
44°
27
58°
45°
28
54°
41°
29
58°
46°
30
57°
47°
1
59°
47°
2
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Portsmouth
Portsmouth's April 2026 forecast shows daily high temperatures ranging from 54° to 60°, with overnight lows between 41° and 51°. The average high for April is 58° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Portsmouth. See also: May | June | July.
