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.

Monday
19th Jan
36

27

3

1
Tuesday
20th Jan
25

16

5

1
Wednesday
21st Jan
28

14

0

1
Thursday
22nd Jan
36

25

6

1

5-day weather forecast updated at 04:06 on Saturday 17th January 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 Monday 19th January 2026

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 gentle breeze of 11 mph from the south-west.

36
°F maximum temperature
27
°F minimum temperature
broken clouds
3
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
27
°F wind chill
11
mph wind from SW

Portsmouth weather for Tuesday 20th January 2026

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 25°F, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 13 mph from the west.

25
°F maximum temperature
16
°F minimum temperature
scattered clouds
5
hours of sunshine
1
UV index (Low)
0
cm of snow expected
14
°F wind chill
13
mph wind from W

Portsmouth weather for Wednesday 21st January 2026

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 28°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 9 mph from the south-west.

28
°F maximum temperature
14
°F minimum temperature
broken clouds
0
hours of sunshine
1
UV index (Low)
0
cm of snow expected
19
°F wind chill
9
mph wind from SW

Portsmouth weather for Thursday 22nd January 2026

Expect clear skies with flurries of snow in Portsmouth, New Hampshire with a maximum temperature of 36°F, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 36% chance of some snow and a gentle breeze of 12 mph from the south-west.