Measurements:
°C
°F
CURRENT WEATHER
07:22
Portsmouth
36°F
NW 7 mph
Feels like: 32°F
Precip: 72%
World Resorts USA Portsmouth Weather

7 Day Weather Forecast

04.03
fri
DAY
40°F
N 8 mph
precip
100%
NIGHT
52°F
NE 14 mph
precip
0%
04.04
sat
DAY
46°F
W 12 mph
precip
0%
NIGHT
36°F
NW 10 mph
precip
0%
04.05
sun
DAY
44°F
NE 6 mph
precip
0%
NIGHT
40°F
E 11 mph
precip
0%
04.06
mon
DAY
44°F
SE 15 mph
precip
0%
NIGHT
34°F
E 6 mph
precip
0%
04.07
tue
DAY
44°F
E 2 mph
precip
100%
NIGHT
28°F
SE 9 mph
precip
0%
04.08
wed
DAY
36°F
SW 7 mph
precip
0%
NIGHT
26°F
NE 7 mph
precip
0%
04.09
thu
DAY
46°F
N 12 mph
precip
0%
NIGHT
36°F
NE 9 mph
precip
0%

Portsmouth Sea Water Temperature in April, °F

Select Year: 2025 2024 2023

The average sea surface temperature in April 2025 for Portsmouth was 5.2°F. The maximum and minimum values were 4.4°F and 7.2°F respectively.

Portsmouth on the Weather Map

Best Time to Visit Portsmouth
The most sunny months:
November 16 days
October 14 days
September 13 days
The most warm months:
July 81.7 °F
August 80.0 °F
June 75.2 °F
Warmest sea temperature:
August 66.7 °F
July 64.8 °F
September 63.6 °F
The most cold months:
January 30.9 °F
February 32.1 °F
December 36.4 °F
The most rainy months:
July 3 days
April 3 days
August 2 days
The most windy months:
January 9 mph
March 9 mph
November 9 mph
more details