Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 41°F. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

Thursday
5th Mar
41

27

2

3
Friday
6th Mar
34

32

0

1
Saturday
7th Mar
46

34

0

2
Sunday
8th Mar
55

37

9

4
Monday
9th Mar
59

37

12

4

5-day weather forecast updated at 04:03 on Thursday 5th March 2026 GMT

More about Portsmouth

Portsmouth by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for New Hampshire

GO Airport Shuttle discount code: 5% off airport transfers

Discount Code

Save EXTRA 5% on airport transfers worldwide
Book private taxis & shuttle buses with discount code
Enter in coupon box on 'Reservations' page

Show discount code

******WEB

Redeem GO Airport Shuttle discount code >>

Expires at 23:59 on Thursday 31st Dec 2026

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 Thursday 5th March 2026

Expect mostly cloudy with light snow in Portsmouth, New Hampshire with a maximum temperature of 41°F, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 cm of snow expected with 91% chance of some snow and a gentle breeze of 12 mph from the north-east.

41
°F maximum temperature
27
°F minimum temperature
mostly cloudy with light snow
2
hours of sunshine
3
UV index (Moderate)
91
% chance of some snow
<5
cm of snow expected
34
°F wind chill
12
mph wind from NE

Portsmouth weather for Friday 6th March 2026

Expect cloudy with sleet or snow in Portsmouth, New Hampshire with a maximum temperature of 34°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 mm of sleet/snow expected with 50% chance of some sleet or snow and a gentle breeze of 11 mph from the north-east.

34
°F maximum temperature
32
°F minimum temperature
cloudy with sleet or snow
0
hours of sunshine
1
UV index (Low)
50
% chance of some sleet or snow
<20
mm of sleet/snow expected
27
°F wind chill
11
mph wind from NE

Portsmouth weather for Saturday 7th March 2026

Expect overcast with light rain in Portsmouth, New Hampshire with a maximum temperature of 46°F, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 11 mph from the south-west.

46
°F maximum temperature
34
°F minimum temperature
overcast with light rain
0
hours of sunshine
2
UV index (Low)
25
% chance of some rain
<2
mm of rainfall expected
43
°F wind chill
11
mph wind from SW

Portsmouth weather for Sunday 8th March 2026

Expect sunshine and showers in Portsmouth, New Hampshire with a maximum temperature of 55°F, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 8% chance of some rain and a gentle breeze of 10 mph from the west.

55
°F maximum temperature
37
°F minimum temperature
sunshine and showers
9
hours of sunshine
4
UV index (Moderate)
8
% chance of some rain
<2
mm of rainfall expected
55
°F wind chill
10
mph wind from W

Portsmouth weather for Monday 9th March 2026

Expect clear skies in Portsmouth, New Hampshire with a maximum temperature of 59°F, maximum UV of 4 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the south-west.