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
    Scattered clouds
  • Wednesday
    29th Oct
    Scattered clouds

5-day weather forecast updated at 04:03 on Sunday 26th 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 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

  • 13°C maximum temperature13
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 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 Sunday 26th October 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 12°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.

  • 12°C maximum temperature12
    °C maximum temperature
  • 4°C minimum temperature4
    °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
  • 12°C wind chill12
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    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 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north.

  • 12°C maximum temperature12
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    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
  • Light breeze of 12 kph from the North12
    kph wind from N

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Portsmouth weather for Tuesday 28th October 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 12°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-east.

  • 12°C maximum temperature12
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    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
  • Gentle breeze of 17 kph from the North-East17
    kph wind from NE

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Portsmouth weather for Wednesday 29th October 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 12°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north.

  • 12°C maximum temperature12
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Gentle breeze of 14 kph from the North14
    kph wind from N

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

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