25.12
thu
thu
Day
34°F
E 9 mph
Precip.
0%
0%
Night
16°F
SE 13 mph
Precip.
0%
0%
26.12
fri
fri
Day
19°F
SE 7 mph
Precip.
0%
0%
Night
19°F
S 9 mph
Precip.
0%
0%
27.12
sat
sat
Day
23°F
S 8 mph
Precip.
0%
0%
Night
18°F
SE 4 mph
Precip.
0%
0%
28.12
sun
sun
Day
28°F
E 5 mph
Precip.
0%
0%
Night
28°F
NE 3 mph
Precip.
0%
0%
29.12
mon
mon
Day
37°F
E 12 mph
Precip.
48%
48%
Night
25°F
E 17 mph
Precip.
21%
21%
30.12
tue
tue
Day
23°F
E 18 mph
Precip.
0%
0%
Night
19°F
E 15 mph
Precip.
0%
0%
31.12
wed
wed
Day
23°F
E 11 mph
Precip.
30%
30%
Night
27°F
NE 12 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 45.4°F. The highest and lowest sea temperatures during the month were 47.8°F and 43.5°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: 04:55
December 25, thursday
0600
25°F
NE
9 mph
9 mph
0900
27°F
NE
9 mph
9 mph
1200
34°F
E
9 mph
9 mph
1500
36°F
SE
12 mph
12 mph
1800
30°F
SE
17 mph
17 mph
2100
21°F
SE
15 mph
15 mph
December 26, friday
0000
16°F
SE
13 mph
13 mph
0300
12°F
SE
11 mph
11 mph
