Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 28°F. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

Tuesday
24th Feb
28

12

9

3
Wednesday
25th Feb
32

10

3

1
Thursday
26th Feb
37

23

1

2
Friday
27th Feb
36

21

11

3
Saturday
28th Feb
45

21

11

2

5-day weather forecast updated at 04:05 on Tuesday 24th February 2026 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 Tuesday 24th February 2026

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 28°F, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 12 mph from the north-west.

28
°F maximum temperature
12
°F minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
cm of snow expected
19
°F wind chill
12
mph wind from NW

Portsmouth weather for Wednesday 25th February 2026

Expect cloudy with sleet or snow in Portsmouth, New Hampshire with a maximum temperature of 32°F, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 2-5 cm of snow expected with 100% chance of some snow and a light breeze of 7 mph from the south-west.

32
°F maximum temperature
10
°F minimum temperature
cloudy with sleet or snow
3
hours of sunshine
1
UV index (Low)
100
% chance of some snow
<5
cm of snow expected
27
°F wind chill
7
mph wind from SW

Portsmouth weather for Thursday 26th February 2026

Expect cloudy with sleet or snow in Portsmouth, New Hampshire with a maximum temperature of 37°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 2-5 mm of sleet/snow expected with 25% chance of some sleet or snow and a gentle breeze of 9 mph from the west.

37
°F maximum temperature
23
°F minimum temperature
cloudy with sleet or snow
1
hour of sunshine
2
UV index (Low)
25
% chance of some sleet or snow
<5
mm of sleet/snow expected
30
°F wind chill
9
mph wind from W

Portsmouth weather for Friday 27th February 2026

Expect clear skies with flurries of snow in Portsmouth, New Hampshire with a maximum temperature of 36°F, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0-2 cm of snow expected with 23% chance of some snow and a light breeze of 6 mph from the north-west.

36
°F maximum temperature
21
°F minimum temperature
clear skies with flurries of snow
11
hours of sunshine
3
UV index (Moderate)
23
% chance of some snow
<2
cm of snow expected
32
°F wind chill
6
mph wind from NW

Portsmouth weather for Saturday 28th February 2026

Expect clear skies in Portsmouth, New Hampshire with a maximum temperature of 45°F, maximum UV of 2 (Low) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the south-west.