29.04
wed
wed
Day
52°F
W 9 mph
Precip.
0%
0%
Night
45°F
S 2 mph
Precip.
64%
64%
30.04
thu
thu
Day
46°F
NW 2 mph
Precip.
100%
100%
Night
46°F
SE 5 mph
Precip.
100%
100%
01.05
fri
fri
Day
54°F
SE 7 mph
Precip.
0%
0%
Night
43°F
E 9 mph
Precip.
0%
0%
02.05
sat
sat
Day
54°F
E 6 mph
Precip.
0%
0%
Night
41°F
SE 6 mph
Precip.
0%
0%
03.05
sun
sun
Day
52°F
E 12 mph
Precip.
0%
0%
Night
41°F
E 9 mph
Precip.
0%
0%
04.05
mon
mon
Day
57°F
E 11 mph
Precip.
0%
0%
Night
45°F
NE 6 mph
Precip.
0%
0%
05.05
tue
tue
Day
64°F
NE 11 mph
Precip.
0%
0%
Night
55°F
NE 12 mph
Precip.
100%
100%
sea water
temperature
temperature
| Portsmouth |
monthly
weather
weather
| Portsmouth |
current
weather
weather
| Portsmouth |
14 days
forecast
forecast
| Portsmouth |
Sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 42.3°F. The highest and lowest sea temperatures during the month were 46.0°F and 39.4°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 48.8°F. The highest and lowest sea temperatures during the month were 52.3°F and 43.2°F.
Air temperature in Portsmouth, °F
Precipitation total in Portsmouth, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 08:35
April 29, wednesday
0900
48°F
SW
8 mph
8 mph
1200
52°F
W
9 mph
9 mph
1500
50°F
W
6 mph
6 mph
1800
46°F
W
9 mph
9 mph
2100
45°F
W
9 mph
9 mph
April 30, thursday
0000
45°F
S
2 mph
2 mph
0300
45°F
S
2 mph
2 mph
0600
45°F
SW
2 mph
2 mph
