Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 32°F. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

Sunday
14th Dec
32

16

0

1
Monday
15th Dec
25

14

7

1
Tuesday
16th Dec
32

19

8

1
Wednesday
17th Dec
41

25

4

1
Thursday
18th Dec
45

27

5

1

5-day weather forecast updated at 04:04 on Sunday 14th 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 Sunday 14th December 2025

Expect mostly cloudy with light snow in Portsmouth, New Hampshire with a maximum temperature of 32°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 cm of snow expected with 51% chance of some snow and a moderate breeze of 12 mph from the north-west.

32
°F maximum temperature
16
°F minimum temperature
mostly cloudy with light snow
0
hours of sunshine
1
UV index (Low)
51
% chance of some snow
<2
cm of snow expected
23
°F wind chill
12
mph wind from NW

Portsmouth weather for Monday 15th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 25°F, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 14 mph from the north-west.

25
°F maximum temperature
14
°F minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
cm of snow expected
12
°F wind chill
14
mph wind from NW

Portsmouth weather for Tuesday 16th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 32°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 8 mph from the west.

32
°F maximum temperature
19
°F minimum temperature
broken clouds
8
hours of sunshine
1
UV index (Low)
0
cm of snow expected
25
°F wind chill
8
mph wind from W

Portsmouth weather for Wednesday 17th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 41°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the south-west.

41
°F maximum temperature
25
°F minimum temperature
broken clouds
4
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
34
°F wind chill
13
mph wind from SW

Portsmouth weather for Thursday 18th December 2025

Expect sunshine and showers in Portsmouth, New Hampshire with a maximum temperature of 45°F, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 46% chance of some rain and a gentle breeze of 11 mph from the south.