Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 9°C. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

  • Sunday
    16th Nov
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Monday
    17th Nov
    Broken clouds
  • Tuesday
    18th Nov
    Scattered clouds
  • Wednesday
    19th Nov
    Scattered clouds
  • Thursday
    20th Nov
    Mostly cloudy with light rain (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:03 on Sunday 16th November 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 Sunday 16th November 2025

Expect mostly cloudy with rain in Portsmouth, New Hampshire with a maximum temperature of 9°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 12% chance of some rain and a moderate breeze of 25 kph from the west.

  • 9°C maximum temperature9
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 12% chance of some rain12
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 6°C wind chill6
    °C wind chill
  • Moderate breeze of 25 kph from the West25
    kph wind from W

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Portsmouth weather for Monday 17th November 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 5°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 29 kph from the west.

  • 5°C maximum temperature5
    °C maximum temperature
  • 2°C minimum temperature2
    °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 mm of rainfall expected0
    mm of rainfall expected
  • 0°C wind chill0
    °C wind chill
  • Fresh breeze of 29 kph from the West29
    kph wind from W

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Portsmouth weather for Tuesday 18th November 2025

Expect scattered clouds 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 mm of rainfall expected and a moderate breeze of 23 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • 0°C minimum temperature0
    °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
  • 2°C wind chill2
    °C wind chill
  • Moderate breeze of 23 kph from the West23
    kph wind from W

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Portsmouth weather for Wednesday 19th November 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 7°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

  • 7°C maximum temperature7
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 4°C wind chill4
    °C wind chill
  • Light breeze of 12 kph from the West12
    kph wind from W

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Portsmouth weather for Thursday 20th November 2025

Expect mostly cloudy with light rain in Portsmouth, New Hampshire with a maximum temperature of 6°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a light breeze of 7 kph from the north-west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 25% chance of some rain25
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Light breeze of 7 kph from the North-West7
    kph wind from NW

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

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