World Resorts USA Portsmouth Weather

Portsmouth 7 Days Forecast

23.04
wed
Day
63°F
SE 11 mph
Precip.
0%
Night
54°F
SE 4 mph
Precip.
0%
24.04
thu
Day
64°F
NE 4 mph
Precip.
0%
Night
55°F
E 2 mph
Precip.
0%
25.04
fri
Day
64°F
NW 2 mph
Precip.
0%
Night
45°F
SW 4 mph
Precip.
0%
26.04
sat
Day
63°F
NE 9 mph
Precip.
0%
Night
43°F
SE 14 mph
Precip.
0%
27.04
sun
Day
52°F
SE 15 mph
Precip.
0%
Night
45°F
E 7 mph
Precip.
0%
28.04
mon
Day
64°F
E 6 mph
Precip.
0%
Night
52°F
NE 5 mph
Precip.
0%
29.04
tue
Day
73°F
NE 11 mph
Precip.
0%
Night
66°F
NE 11 mph
Precip.
0%

Sea water temperature in April, °F

Show year:
2025
2024
2023
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
35
38
41
44
47
50
53

The average sea water temperature in April of 2025 was 40.6°F. The highest and lowest sea temperatures during the month were 42.3°F and 39.9°F.

Sea water temperature in May, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
40
43
46
49
52
55
58
61

The average sea water temperature in May of 2024 was 51.0°F. The highest and lowest sea temperatures during the month were 55.2°F and 45.5°F.

Air temperature in Portsmouth, °F

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0
13
26
39
52
65
78
91
104
38.7
49.3
59.8
70.1
76.6
78.0
72.2
62.6
50.5
42.9
34.2
33.2
32.5
39.7
49.7
58.3
64.7
66.3
60.0
50.5
40.8
32.9
26.3
26.7
Day temperature   
Night temperature

Precipitation total in Portsmouth, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.3
0.6
0.9
1.3
1.6
1.9
2.2
1.5
0.9
1.2
0.9
1.3
1.8
1
0.9
1.5
1.2
0.9
1.2
* Charts above show average data for the last 3 years.

Best time for vacation in Portsmouth

Sunniest months:
November 15 days
September 13 days
October 12 days
Warmest months:
July 78.0 °F
August 76.6 °F
June 72.2 °F
Warmest sea temp:
August 65.3 °F
July 63.4 °F
September 62.4 °F
Coldest months:
January 33.2 °F
February 34.2 °F
December 38.7 °F
Rainiest months:
December 3 days
July 3 days
April 3 days
Windiest months:
March 9.7 mph
January 9.7 mph
February 9.6 mph

Portsmouth on a weather map

Leaflet | Tiles © Esri
Places in USA:
Name
°F
Boston
+63°F
Washington
+68°F
Hawaii
+77°F
Honolulu
+77°F
Las Vegas
+84°F
Los Angeles
+63°F
Miami
+73°F
New York
+61°F
Orlando
+75°F
San Diego
+61°F
San Francisco
+50°F
Sarasota
+75°F
Tampa
+81°F
Houston
+77°F
Chicago
+64°F
all places
24 Hours Forecast
Portsmouth
Local time: 20:09
April 23, wednesday
2100
59°F
SE
5 mph
April 24, thursday
0000
54°F
SE
4 mph
0300
48°F
NE
2 mph
0600
45°F
SE
2 mph
0900
52°F
E
2 mph
1200
64°F
NE
4 mph
1500
66°F
N
7 mph
1800
61°F
NW
9 mph
Units of measurement: °C / °F