30.03
mon
mon
Day
63°F
NE 14 mph
Precip.
0%
0%
Night
52°F
NE 6 mph
Precip.
0%
0%
31.03
tue
tue
Day
55°F
W 9 mph
Precip.
0%
0%
Night
55°F
SW 7 mph
Precip.
0%
0%
01.04
wed
wed
Day
64°F
NE 14 mph
Precip.
100%
100%
Night
41°F
S 6 mph
Precip.
0%
0%
02.04
thu
thu
Day
37°F
SW 11 mph
Precip.
100%
100%
Night
37°F
W 7 mph
Precip.
100%
100%
03.04
fri
fri
Day
39°F
W 6 mph
Precip.
81%
81%
Night
32°F
SW 9 mph
Precip.
100%
100%
04.04
sat
sat
Day
36°F
W 5 mph
Precip.
100%
100%
Night
37°F
N 6 mph
Precip.
24%
24%
05.04
sun
sun
Day
59°F
NE 13 mph
Precip.
0%
0%
Night
59°F
NE 14 mph
Precip.
27%
27%
sea water
temperature
temperature
| Portsmouth |
monthly
weather
weather
| Portsmouth |
current
weather
weather
| Portsmouth |
14 days
forecast
forecast
| Portsmouth |
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 37.5°F. The highest and lowest sea temperatures during the month were 38.8°F and 35.4°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 41.4°F. The highest and lowest sea temperatures during the month were 45.0°F and 39.9°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: 04:51
March 30, monday
0600
34°F
NE
12 mph
12 mph
0900
45°F
NE
13 mph
13 mph
1200
63°F
NE
14 mph
14 mph
1500
72°F
NE
14 mph
14 mph
1800
63°F
E
14 mph
14 mph
2100
55°F
NE
9 mph
9 mph
March 31, tuesday
0000
52°F
NE
6 mph
6 mph
0300
48°F
NE
5 mph
5 mph
