Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 8°C. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

Sunday
19th Apr
8

3

1

1
Monday
20th Apr
8

1

5

4
Tuesday
21st Apr
6

0

9

5
Wednesday
22nd Apr
10

3

2

2
Thursday
23rd Apr
14

6

0

5

5-day weather forecast updated at 04:03 on Sunday 19th April 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 Sunday 19th April 2026

Expect mostly cloudy with rain in Portsmouth, New Hampshire with a maximum temperature of 8°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 100% chance of some rain and a moderate breeze of 20 kph from the north-west.

8
°C maximum temperature
3
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
1
UV index (Low)
100
% chance of some rain
<20
mm of rainfall expected
5
°C wind chill
20
kph wind from NW

Portsmouth weather for Monday 20th April 2026

Expect mostly cloudy with light rain in Portsmouth, New Hampshire with a maximum temperature of 8°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 20% chance of some rain and a gentle breeze of 14 kph from the west.

8
°C maximum temperature
1
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
4
UV index (Moderate)
20
% chance of some rain
<2
mm of rainfall expected
5
°C wind chill
14
kph wind from W

Portsmouth weather for Tuesday 21st April 2026

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 6°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-east.

6
°C maximum temperature
0
°C minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
3
°C wind chill
15
kph wind from SE

Portsmouth weather for Wednesday 22nd April 2026

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 10°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.

10
°C maximum temperature
3
°C minimum temperature
broken clouds
2
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from S

Portsmouth weather for Thursday 23rd April 2026

Expect overcast skies in Portsmouth, New Hampshire with a maximum temperature of 14°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north-west.