Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 19°F. 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 Friday 5th 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 Friday 5th December 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 19°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 11 mph from the south-west.

  • 19°F maximum temperature19
    °F maximum temperature
  • 9°F minimum temperature9
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 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
  • 9°F wind chill9
    °F wind chill
  • Gentle breeze of 11 mph from the South-West11
    mph wind from SW

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Portsmouth weather for Saturday 6th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 32°F, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0 cm of snow expected and a light breeze of 7 mph from the south-west.

  • 32°F maximum temperature32
    °F maximum temperature
  • 19°F minimum temperature19
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • 27°F wind chill27
    °F wind chill
  • Light breeze of 7 mph from the South-West7
    mph wind from SW

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Portsmouth weather for Sunday 7th December 2025

Expect clear skies with flurries of snow in Portsmouth, New Hampshire with a maximum temperature of 34°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a light breeze of 7 mph from the north-west.

  • 34°F maximum temperature34
    °F maximum temperature
  • 23°F minimum temperature23
    °F minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 25% chance of some snow25
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 27°F wind chill27
    °F wind chill
  • Light breeze of 7 mph from the North-West7
    mph wind from NW

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Portsmouth weather for Monday 8th December 2025

Expect mostly cloudy with snow in Portsmouth, New Hampshire with a maximum temperature of 25°F, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 10-20 cm of snow expected with 38% chance of some snow and a moderate breeze of 13 mph from the north-west.

  • 25°F maximum temperature25
    °F maximum temperature
  • 9°F minimum temperature9
    °F minimum temperature
  • Mostly cloudy with snow
    mostly cloudy with snow
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 38% chance of some snow38
    % chance of some snow
  • 10-20 cm of snow expected<20
    cm of snow expected
  • 14°F wind chill14
    °F wind chill
  • Moderate breeze of 13 mph from the North-West13
    mph wind from NW

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Portsmouth weather for Tuesday 9th December 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 27°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 10 mph from the south-west.

  • 27°F maximum temperature27
    °F maximum temperature
  • 7°F minimum temperature7
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • 16°F wind chill16
    °F wind chill
  • Gentle breeze of 10 mph from the South-West10
    mph wind from SW

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