Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 13°C. Select a day from the live weather forecast for Portsmouth, New Hampshire, USA for more weather parameters.

  • Saturday
    25th Oct
    Broken clouds
  • Sunday
    26th Oct
    Broken clouds
  • Monday
    27th Oct
    Broken clouds
  • Tuesday
    28th Oct
    Mostly cloudy with light rain (0-2 mm of rainfall expected)
  • Wednesday
    29th Oct
    Cloudy with some rain (10-20 mm of rainfall expected)

5-day weather forecast updated at 04:03 on Saturday 25th October 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 Saturday 25th October 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 13°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

  • 13°C maximum temperature13
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 13°C wind chill13
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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Portsmouth weather for Sunday 26th October 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 11°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

  • 11°C maximum temperature11
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 10 kph from the North-West10
    kph wind from NW

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Portsmouth weather for Monday 27th October 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 12°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north.

  • 12°C maximum temperature12
    °C maximum temperature
  • 4°C minimum temperature4
    °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
  • 12°C wind chill12
    °C wind chill
  • Gentle breeze of 13 kph from the North13
    kph wind from N

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Portsmouth weather for Tuesday 28th October 2025

Expect mostly cloudy with light rain in Portsmouth, New Hampshire with a maximum temperature of 11°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 42% chance of some rain and a gentle breeze of 18 kph from the north.

  • 11°C maximum temperature11
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 42% chance of some rain42
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 11°C wind chill11
    °C wind chill
  • Gentle breeze of 18 kph from the North18
    kph wind from N

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Portsmouth weather for Wednesday 29th October 2025

Expect cloudy with some rain in Portsmouth, New Hampshire with a maximum temperature of 11°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 32% chance of some rain and a gentle breeze of 17 kph from the north.

  • 11°C maximum temperature11
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Cloudy with some rain
    cloudy with some rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 32% chance of some rain32
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 17 kph from the North17
    kph wind from N

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

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