Measurements:
°C
°F
CURRENT WEATHER
13:10
Portsmouth
88°F
NE 6 mph
Feels like: 90°F
Precip: 0%
World Resorts USA Portsmouth Weather

7 Day Weather Forecast

06.04
thu
DAY
88°F
NE 6 mph
precip
0%
NIGHT
66°F
E 6 mph
precip
2%
06.05
fri
DAY
82°F
E 4 mph
precip
0%
NIGHT
64°F
NE 5 mph
precip
3%
06.06
sat
DAY
86°F
NE 12 mph
precip
0%
NIGHT
66°F
NE 6 mph
precip
82%
06.07
sun
DAY
72°F
SW 5 mph
precip
87%
NIGHT
54°F
SW 11 mph
precip
73%
06.08
mon
DAY
64°F
SW 12 mph
precip
1%
NIGHT
52°F
SE 6 mph
precip
3%
06.09
tue
DAY
70°F
W 6 mph
precip
1%
NIGHT
60°F
NE 6 mph
precip
3%
06.10
wed
DAY
74°F
W 7 mph
precip
1%
NIGHT
58°F
NE 5 mph
precip
2%

Portsmouth Sea Water Temperature in June, °F

Select Year: 2025 2024 2023

The average sea surface temperature in June 2025 for Portsmouth was 13.6°F. The maximum and minimum values were 10.0°F and 16.3°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
August 2 days
October 2 days
The most windy months:
January 9 mph
March 9 mph
November 9 mph
more details