Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 36°F. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

Thursday
25th Dec
36

18

3

1
Friday
26th Dec
21

10

8

1
Saturday
27th Dec
25

16

8

1
Sunday
28th Dec
32

16

5

1
Monday
29th Dec
43

28

1

0

5-day weather forecast updated at 04:04 on Thursday 25th December 2025 GMT

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The 5-day weather forecast for New Hampshire (Portsmouth) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Portsmouth weather forecast by day

Below are the detailed weather forecasts for Portsmouth for the next 5 days.

Portsmouth weather for Thursday 25th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 36°F, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 15 mph from the north-west.

36
°F maximum temperature
18
°F minimum temperature
broken clouds
3
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
27
°F wind chill
15
mph wind from NW

Portsmouth weather for Friday 26th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 21°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 11 mph from the north-west.

21
°F maximum temperature
10
°F minimum temperature
scattered clouds
8
hours of sunshine
1
UV index (Low)
0
cm of snow expected
10
°F wind chill
11
mph wind from NW

Portsmouth weather for Saturday 27th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 25°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 7 mph from the north.

25
°F maximum temperature
16
°F minimum temperature
scattered clouds
8
hours of sunshine
1
UV index (Low)
0
cm of snow expected
16
°F wind chill
7
mph wind from N

Portsmouth weather for Sunday 28th December 2025

Expect sunshine and showers in Portsmouth, New Hampshire with a maximum temperature of 32°F, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 30% chance of some snow and a light breeze of 6 mph from the south-west.

32
°F maximum temperature
16
°F minimum temperature
sunshine and showers
5
hours of sunshine
1
UV index (Low)
30
% chance of some snow
<2
cm of snow expected
27
°F wind chill
6
mph wind from SW

Portsmouth weather for Monday 29th December 2025

Expect mostly cloudy with rain in Portsmouth, New Hampshire with a maximum temperature of 43°F and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 88% chance of some rain and a moderate breeze of 16 mph from the west.