S
M
T
W
T
F
S
29
62°
31°
30
73°
52°
31
80°
60°
1
85°
63°
2
83°
64°
3
83°
64°
4
84°
64°
5
81°
59°
6
61°
51°
7
58°
49°
8
49°
42°
9
55°
43°
10
69°
41°
11
70°
53°
12
N/A
13
87°
63°
14
95°
65°
15
91°
66°
16
91°
63°
17
82°
62°
18
84°
65°
19
84°
54°
20
65°
48°
21
69°
49°
22
71°
58°
23
77°
56°
24
77°
59°
25
75°
51°
26
67°
55°
27
69°
52°
28
69°
56°
29
73°
57°
30
72°
56°
1
69°
54°
2
69°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Portsmouth
Portsmouth's April 2026 forecast shows daily high temperatures ranging from 65° to 95°, with overnight lows between 48° and 66°. The average high for April is 77° with an average low of 57°. 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.
