12.08
wed
wed
Day
88°F
E 5 mph
Precip.
1%
1%
Night
70°F
NE 5 mph
Precip.
4%
4%
13.08
thu
thu
Day
79°F
E 5 mph
Precip.
10%
10%
Night
64°F
SE 9 mph
Precip.
6%
6%
14.08
fri
fri
Day
75°F
SE 15 mph
Precip.
1%
1%
Night
61°F
SE 6 mph
Precip.
3%
3%
15.08
sat
sat
Day
75°F
S 1 mph
Precip.
1%
1%
Night
61°F
NE 6 mph
Precip.
6%
6%
16.08
sun
sun
Day
75°F
NE 8 mph
Precip.
5%
5%
Night
64°F
N 4 mph
Precip.
59%
59%
17.08
mon
mon
Day
75°F
SW 6 mph
Precip.
20%
20%
Night
63°F
SE 6 mph
Precip.
7%
7%
18.08
tue
tue
Day
77°F
N 6 mph
Precip.
2%
2%
Night
64°F
NE 6 mph
Precip.
9%
9%
sea water
temperature
temperature
| Portsmouth |
monthly
weather
weather
| Portsmouth |
current
weather
weather
| Portsmouth |
14 days
forecast
forecast
| Portsmouth |
Sea water temperature in August, °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.
Air temperature in Portsmouth, °F
Precipitation total in Portsmouth, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 15:45
August 12, wednesday
1800
86°F
NE
4 mph
4 mph
2100
75°F
NE
6 mph
6 mph
August 13, thursday
0000
70°F
NE
5 mph
5 mph
0300
66°F
E
6 mph
6 mph
0600
63°F
NE
8 mph
8 mph
0900
70°F
NE
9 mph
9 mph
1200
79°F
E
5 mph
5 mph
1500
75°F
E
2 mph
2 mph
