Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 2°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 Thursday 4th 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 Thursday 4th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 2°C, maximum UV of 1 (Low) 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
  • -11°C minimum temperature-11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    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 Friday 5th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of -7°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 18 kph from the west.

  • -7°C maximum temperature-7
    °C maximum temperature
  • -14°C minimum temperature-14
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -13°C wind chill-13
    °C wind chill
  • Gentle breeze of 18 kph from the West18
    kph wind from W

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Portsmouth weather for Saturday 6th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of -1°C and no hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 11 kph from the west.

  • -1°C maximum temperature-1
    °C maximum temperature
  • -9°C minimum temperature-9
    °C minimum temperature
  • Broken clouds
    broken clouds
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 0 cm of snow expected0
    cm of snow expected
  • -5°C wind chill-5
    °C wind chill
  • Light breeze of 11 kph from the West11
    kph wind from W

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Portsmouth weather for Sunday 7th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 1°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.

  • 1°C maximum temperature1
    °C maximum temperature
  • -6°C minimum temperature-6
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -3°C wind chill-3
    °C wind chill
  • Gentle breeze of 13 kph from the West13
    kph wind from W

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Portsmouth weather for Monday 8th December 2025

Expect clear skies in Portsmouth, New Hampshire with a maximum temperature of -6°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 16 kph from the north-west.

  • -6°C maximum temperature-6
    °C maximum temperature
  • -12°C minimum temperature-12
    °C minimum temperature
  • Clear skies
    clear skies
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • -12°C wind chill-12
    °C wind chill
  • Gentle breeze of 16 kph from the North-West16
    kph wind from NW

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

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