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.

Monday
6th Apr
8

2

6

4
Tuesday
7th Apr
3

-2

4

2
Wednesday
8th Apr
6

-3

13

5
Thursday
9th Apr
10

-1

9

5
Friday
10th Apr
18

5

2

5

5-day weather forecast updated at 04:03 on Monday 6th 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 Monday 6th April 2026

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 8°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the west.

8
°C maximum temperature
2
°C minimum temperature
broken clouds
6
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
5
°C wind chill
22
kph wind from W

Portsmouth weather for Tuesday 7th April 2026

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 3°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

3
°C maximum temperature
-2
°C minimum temperature
broken clouds
4
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
-1
°C wind chill
16
kph wind from NW

Portsmouth weather for Wednesday 8th April 2026

Expect clear skies in Portsmouth, New Hampshire with a maximum temperature of 6°C, maximum UV of 5 (Moderate) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

6
°C maximum temperature
-3
°C minimum temperature
clear skies
13
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
2
°C wind chill
15
kph wind from S

Portsmouth weather for Thursday 9th April 2026

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 10°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the south.

10
°C maximum temperature
-1
°C minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
19
kph wind from S

Portsmouth weather for Friday 10th April 2026

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.