World Resorts

USA

Portsmouth Weather

Portsmouth 14 Days Forecast

25.12
thu

Day

32°F

E 10 mph

Precip.
0%

Night

16°F

SE 12 mph

Precip.
0%

26.12
fri

Day

16°F

SE 7 mph

Precip.
0%

Night

18°F

S 6 mph

Precip.
0%

27.12
sat

Day

23°F

S 5 mph

Precip.
0%

Night

18°F

SE 6 mph

Precip.
0%

28.12
sun

Day

32°F

SE 6 mph

Precip.
0%

Night

28°F

NE 3 mph

Precip.
0%

29.12
mon

Day

41°F

NE 11 mph

Precip.
80%

Night

27°F

E 19 mph

Precip.
0%

30.12
tue

Day

28°F

E 17 mph

Precip.
0%

Night

23°F

E 12 mph

Precip.
0%

31.12
wed

Day

27°F

E 11 mph

Precip.
0%

Night

28°F

NE 12 mph

Precip.
0%

01.01
thu

Day

34°F

E 8 mph

Precip.
0%

Night

23°F

SE 6 mph

Precip.
0%

02.01
fri

Day

27°F

W 2 mph

Precip.
0%

Night

28°F

SW 2 mph

Precip.
0%

03.01
sat

Day

32°F

E 1 mph

Precip.
100%

Night

39°F

N 9 mph

Precip.
22%

04.01
sun

Day

41°F

NE 11 mph

Precip.
47%

Night

28°F

E 15 mph

Precip.
0%

05.01
mon

Day

28°F

E 14 mph

Precip.
0%

Night

23°F

E 13 mph

Precip.
0%

06.01
tue

Day

21°F

SE 14 mph

Precip.
0%

Night

16°F

SE 9 mph

Precip.
0%

07.01
wed

Day

19°F

E 2 mph

Precip.
0%

Night

25°F

NW 5 mph

Precip.
0%

sea water
temperature

Portsmouth

monthly
weather

Portsmouth

current
weather

Portsmouth

7 days
forecast

Portsmouth

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2025

2024

2023

The average sea water temperature in December of 2025 was 45.4°F. The highest and lowest sea temperatures during the month were 47.8°F and 43.5°F.

Show year:

2025

2024

2023

The average sea water temperature in January of 2025 was 41.0°F. The highest and lowest sea temperatures during the month were 42.8°F and 39.4°F.