Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 4°C. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

5-day weather forecast updated at 04:04 on Monday 1st December 2025 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 1st December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 4°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the north-west.

  • 4°C maximum temperature4
    °C maximum temperature
  • -3°C minimum temperature-3
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -1°C wind chill-1
    °C wind chill
  • Moderate breeze of 23 kph from the North-West23
    kph wind from NW

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Portsmouth weather for Tuesday 2nd December 2025

Expect cloudy with sleet or snow in Portsmouth, New Hampshire with a maximum temperature of 0°C and no hours of bright sunshine. There are 50 cm or more snow expected with 100% chance of some snow and a moderate breeze of 26 kph from the north-east.

  • 0°C maximum temperature0
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 100% chance of some snow100
    % chance of some snow
  • 50 cm or more of snow expected>50
    cm of snow expected
  • -6°C wind chill-6
    °C wind chill
  • Moderate breeze of 26 kph from the North-East26
    kph wind from NE

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Portsmouth weather for Wednesday 3rd December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 1°C, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the north-west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -4°C minimum temperature-4
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -4°C wind chill-4
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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Portsmouth weather for Thursday 4th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 2°C and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the north-west.

  • 2°C maximum temperature2
    °C maximum temperature
  • -13°C minimum temperature-13
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -3°C wind chill-3
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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Portsmouth weather for Friday 5th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of -4°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 17 kph from the south-west.

  • -4°C maximum temperature-4
    °C maximum temperature
  • -15°C minimum temperature-15
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -9°C wind chill-9
    °C wind chill
  • Gentle breeze of 17 kph from the South-West17
    kph wind from SW

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Expires at 23:59 on Wednesday 31st Dec 2025

Metric (°C / mm)  |  Imperial (°F / inches)

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