31.12
wed
wed
Day
27°F
NE 14 mph
Precip.
0%
0%
Night
27°F
NE 11 mph
Precip.
0%
0%
01.01
thu
thu
Day
27°F
E 17 mph
Precip.
0%
0%
Night
19°F
E 12 mph
Precip.
0%
0%
02.01
fri
fri
Day
21°F
E 13 mph
Precip.
0%
0%
Night
19°F
E 7 mph
Precip.
0%
0%
03.01
sat
sat
Day
25°F
E 12 mph
Precip.
0%
0%
Night
14°F
SE 7 mph
Precip.
0%
0%
04.01
sun
sun
Day
19°F
E 12 mph
Precip.
0%
0%
Night
16°F
E 7 mph
Precip.
0%
0%
05.01
mon
mon
Day
28°F
NE 11 mph
Precip.
0%
0%
Night
27°F
E 6 mph
Precip.
0%
0%
06.01
tue
tue
Day
25°F
S 8 mph
Precip.
100%
100%
Night
16°F
SE 5 mph
Precip.
0%
0%
sea water
temperature
temperature
| Portsmouth |
monthly
weather
weather
| Portsmouth |
current
weather
weather
| Portsmouth |
14 days
forecast
forecast
| Portsmouth |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 44.8°F. The highest and lowest sea temperatures during the month were 47.8°F and 42.1°F.
Sea water temperature in January, °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.
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: 10:12
December 31, wednesday
1200
27°F
NE
14 mph
14 mph
1500
28°F
NE
12 mph
12 mph
1800
28°F
NE
10 mph
10 mph
2100
27°F
NE
10 mph
10 mph
January 01, thursday
0000
27°F
NE
11 mph
11 mph
0300
27°F
N
11 mph
11 mph
0600
25°F
NE
10 mph
10 mph
0900
25°F
E
12 mph
12 mph
