World Resorts

USA

Portsmouth Weather

Portsmouth 14 Days Forecast

30.03
mon

Day

57°F

NE 14 mph

Precip.
0%

Night

52°F

NE 9 mph

Precip.
0%

31.03
tue

Day

50°F

SW 13 mph

Precip.
0%

Night

41°F

W 3 mph

Precip.
0%

01.04
wed

Day

64°F

NE 12 mph

Precip.
100%

Night

39°F

W 7 mph

Precip.
0%

02.04
thu

Day

37°F

W 10 mph

Precip.
100%

Night

37°F

W 7 mph

Precip.
100%

03.04
fri

Day

39°F

W 6 mph

Precip.
81%

Night

37°F

SW 9 mph

Precip.
100%

04.04
sat

Day

37°F

SW 11 mph

Precip.
100%

Night

37°F

W 6 mph

Precip.
100%

05.04
sun

Day

54°F

NE 11 mph

Precip.
100%

Night

41°F

E 13 mph

Precip.
0%

06.04
mon

Day

45°F

SE 14 mph

Precip.
0%

Night

32°F

NE 6 mph

Precip.
0%

07.04
tue

Day

39°F

W 6 mph

Precip.
0%

Night

30°F

W 2 mph

Precip.
0%

08.04
wed

Day

41°F

NW 9 mph

Precip.
0%

Night

32°F

N 6 mph

Precip.
0%

09.04
thu

Day

46°F

N 6 mph

Precip.
0%

Night

39°F

NE 2 mph

Precip.
0%

10.04
fri

Day

52°F

W 4 mph

Precip.
0%

Night

41°F

SW 9 mph

Precip.
100%

11.04
sat

Day

41°F

W 9 mph

Precip.
0%

Night

37°F

N 3 mph

Precip.
0%

12.04
sun

Day

43°F

W 7 mph

Precip.
0%

Night

39°F

SW 11 mph

Precip.
100%

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:

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.

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.