Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 26°C. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

Wednesday
3rd Jun
26

12

14

7
Thursday
4th Jun
28

15

15

8
Friday
5th Jun
30

17

5

7
Saturday
6th Jun
30

19

7

5
Sunday
7th Jun
21

12

0

1

5-day weather forecast updated at 04:03 on Wednesday 3rd June 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 Wednesday 3rd June 2026

Expect clear skies in Portsmouth, New Hampshire with a maximum temperature of 26°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

26
°C maximum temperature
12
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
26
°C wind chill
11
kph wind from S

Portsmouth weather for Thursday 4th June 2026

Expect clear skies in Portsmouth, New Hampshire with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.

28
°C maximum temperature
15
°C minimum temperature
clear skies
15
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
10
kph wind from SW

Portsmouth weather for Friday 5th June 2026

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the west.

30
°C maximum temperature
17
°C minimum temperature
broken clouds
5
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
10
kph wind from W

Portsmouth weather for Saturday 6th June 2026

Expect sunshine and showers in Portsmouth, New Hampshire with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 52% chance of some rain and a gentle breeze of 15 kph from the south-west.

30
°C maximum temperature
19
°C minimum temperature
sunshine and showers
7
hours of sunshine
5
UV index (Moderate)
52
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
15
kph wind from SW

Portsmouth weather for Sunday 7th June 2026

Expect cloudy with some rain in Portsmouth, New Hampshire with a maximum temperature of 21°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 68% chance of some rain and a gentle breeze of 19 kph from the north-east.