Measurements:
°C
°F
CURRENT WEATHER
16:17
Portsmouth
62°F
SW 2 mph
Feels like: 54°F
Precip: 0%
World Resorts USA Portsmouth Weather

7 Day Weather Forecast

05.18
sat
DAY
56°F
SW 11 mph
precip
0%
NIGHT
52°F
SW 9 mph
precip
100%
05.19
sun
DAY
58°F
SW 12 mph
precip
0%
NIGHT
50°F
S 2 mph
precip
0%
05.20
mon
DAY
66°F
NW 6 mph
precip
0%
NIGHT
54°F
NE 5 mph
precip
0%
05.21
tue
DAY
80°F
N 7 mph
precip
0%
NIGHT
68°F
NE 10 mph
precip
0%
05.22
wed
DAY
84°F
NE 9 mph
precip
0%
NIGHT
68°F
NE 11 mph
precip
66%
05.23
thu
DAY
76°F
NE 12 mph
precip
100%
NIGHT
60°F
SE 6 mph
precip
0%
05.24
fri
DAY
76°F
E 8 mph
precip
0%
NIGHT
62°F
SE 4 mph
precip
0%

Portsmouth Sea Water Temperature in May, °F

Select Year: 2023 2022 2021

The average sea surface temperature in May 2023 for Portsmouth was 10.1°F. The maximum and minimum values were 8.5°F and 12.2°F respectively.

Portsmouth on the Weather Map

Best Time to Visit Portsmouth
The most sunny months:
November 15 days
September 14 days
May 13 days
The most warm months:
July 80.7 °F
August 80.0 °F
June 74.2 °F
Warmest sea temperature:
August 67.3 °F
July 65.5 °F
September 64.2 °F
The most cold months:
January 32.1 °F
February 32.9 °F
December 38.3 °F
The most rainy months:
July 4 days
December 3 days
August 3 days
The most windy months:
March 10 mph
February 9 mph
December 9 mph
more details