World Resorts

USA

Portsmouth Weather

Portsmouth 14 Days Forecast

21.07
tue

Day

84°F

NW 12 mph

Precip.
1%

Night

66°F

N 10 mph

Precip.
68%

22.07
wed

Day

79°F

NE 9 mph

Precip.
34%

Night

64°F

E 6 mph

Precip.
12%

23.07
thu

Day

72°F

E 13 mph

Precip.
1%

Night

57°F

E 4 mph

Precip.
6%

24.07
fri

Day

75°F

N 5 mph

Precip.
2%

Night

59°F

NE 4 mph

Precip.
13%

25.07
sat

Day

73°F

NW 9 mph

Precip.
2%

Night

63°F

NE 4 mph

Precip.
11%

26.07
sun

Day

77°F

N 9 mph

Precip.
2%

Night

66°F

N 8 mph

Precip.
6%

27.07
mon

Day

82°F

NE 9 mph

Precip.
5%

Night

68°F

NE 7 mph

Precip.
59%

28.07
tue

Day

70°F

SE 11 mph

Precip.
29%

Night

64°F

N 2 mph

Precip.
39%

29.07
wed

Day

73°F

W 6 mph

Precip.
14%

Night

63°F

NE 3 mph

Precip.
12%

30.07
thu

Day

75°F

NW 7 mph

Precip.
10%

Night

63°F

N 4 mph

Precip.
16%

31.07
fri

Day

73°F

NW 8 mph

Precip.
4%

Night

63°F

N 6 mph

Precip.
21%

01.08
sat

Day

75°F

NE 12 mph

Precip.
49%

Night

68°F

E 7 mph

Precip.
4%

02.08
sun

Day

81°F

SE 8 mph

Precip.
3%

Night

68°F

E 6 mph

Precip.
5%

03.08
mon

Day

82°F

NE 7 mph

Precip.
5%

Night

73°F

NE 7 mph

Precip.
13%

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 July of 2026 was 65.8°F. The highest and lowest sea temperatures during the month were 70.2°F and 63.0°F.

Show year:

2025

2024

2023

The average sea water temperature in August of 2025 was 63.3°F. The highest and lowest sea temperatures during the month were 65.3°F and 59.7°F.