Portsmouth weather live forecast

Tomorrow's maximum temperature in Portsmouth is expected to be 9°C.

  • Friday
    14th Mar
    Scattered clouds
  • Saturday
    15th Mar
    Broken clouds
  • Sunday
    16th Mar
    Overcast skies
  • Monday
    17th Mar
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Tuesday
    18th Mar
    Scattered clouds

5-day weather forecast updated at 04:02 on Friday 14th March 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 14th March 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 9°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.

  • 9°C maximum temperature9
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 8°C wind chill8
    °C wind chill
  • Light breeze of 10 kph from the South-East10
    kph wind from SE

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Portsmouth weather for Saturday 15th March 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south.

  • 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 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Gentle breeze of 13 kph from the South13
    kph wind from S

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Portsmouth weather for Sunday 16th March 2025

Expect overcast skies in Portsmouth, New Hampshire with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the south.

  • 19°C maximum temperature19
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 19°C wind chill19
    °C wind chill
  • Moderate breeze of 24 kph from the South24
    kph wind from S

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Portsmouth weather for Monday 17th March 2025

Expect mostly cloudy with rain in Portsmouth, New Hampshire with a maximum temperature of 16°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 71% chance of some rain and a moderate breeze of 24 kph from the north-west.

  • 16°C maximum temperature16
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 71% chance of some rain71
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

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Portsmouth weather for Tuesday 18th March 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 12°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

  • 12°C maximum temperature12
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Light breeze of 11 kph from the South11
    kph wind from S

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

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