Measurements:
°C
°F
CURRENT WEATHER
15:18
Portsmouth
96°F
N 5 mph
Feels like: 102°F
Precip: 1%
World Resorts USA Portsmouth Weather

14 Day Weather Forecast

08.05
wed
DAY
90°F
NE 4 mph
precip
4%
NIGHT
76°F
NE 7 mph
precip
10%
08.06
thu
DAY
90°F
NE 2 mph
precip
2%
NIGHT
78°F
NE 6 mph
precip
14%
08.07
fri
DAY
94°F
NW 1 mph
precip
3%
NIGHT
72°F
E 4 mph
precip
21%
08.08
sat
DAY
86°F
NW 1 mph
precip
6%
NIGHT
70°F
E 7 mph
precip
34%
08.09
sun
DAY
90°F
E 4 mph
precip
2%
NIGHT
74°F
E 6 mph
precip
7%
08.10
mon
DAY
90°F
E 8 mph
precip
2%
NIGHT
76°F
E 5 mph
precip
16%
08.11
tue
DAY
70°F
S 8 mph
precip
66%
NIGHT
64°F
N 4 mph
precip
25%
08.12
wed
DAY
76°F
NE 2 mph
precip
17%
NIGHT
66°F
SW 3 mph
precip
30%
08.13
thu
DAY
78°F
NW 2 mph
precip
10%
NIGHT
64°F
E 6 mph
precip
8%
08.14
fri
DAY
82°F
NE 6 mph
precip
2%
NIGHT
64°F
NW 6 mph
precip
7%
08.15
sat
DAY
74°F
W 7 mph
precip
3%
NIGHT
62°F
NE 2 mph
precip
11%
08.16
sun
DAY
72°F
SW 7 mph
precip
6%
NIGHT
64°F
SW 4 mph
precip
18%
08.17
mon
DAY
64°F
SW 5 mph
precip
51%
NIGHT
60°F
SW 6 mph
precip
53%
08.18
tue
DAY
68°F
NE 2 mph
precip
20%
NIGHT
64°F
N 5 mph
precip
21%

Portsmouth Sea Water Temperature in August, °F

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Portsmouth was 64.8°F. The maximum and minimum values were 60.8°F and 67.0°F respectively.

Portsmouth on the Weather Map

Best Time to Visit Portsmouth
The most sunny months:
November 16 days
October 14 days
July 13 days
The most warm months:
July 82.8 °F
August 80.0 °F
June 76.1 °F
Warmest sea temperature:
August 66.7 °F
July 65.2 °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
USA Resorts:
NAME
F°
Boston +94
Chicago +82
Hawaii +82
Houston +106
Las Vegas +124
Los Angeles +92
Maui +78
Miami +92
Myrtle Beach +84
New York +84
San Diego +80
San Francisco +62
Santa Monica +80
Sarasota +92
Washington +88
all resorts
24 Hours Weather Forecast
Portsmouth
Local time: 15:18
05 aug, wednesday
1800 92°F
N
6 mph
2100 80°F
NE
4 mph
06 aug, thursday
0000 76°F
NE
7 mph
0300 72°F
NE
6 mph
0600 70°F
E
5 mph
0900 82°F
E
4 mph
1200 90°F
NE
2 mph
1500 88°F
NW
6 mph