Portsmouth weather live forecast

Tomorrow's maximum temperature in Portsmouth is expected to be 14°C.

  • Tuesday
    15th Apr
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Wednesday
    16th Apr
    Broken clouds
  • Thursday
    17th Apr
    Scattered clouds
  • Friday
    18th Apr
    Scattered clouds
  • Saturday
    19th Apr
    Mostly cloudy with light rain (2-5 mm of rainfall expected)

5-day weather forecast updated at 04:02 on Tuesday 15th April 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 Tuesday 15th April 2025

Expect mostly cloudy with rain in Portsmouth, New Hampshire with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 86% chance of some rain and a moderate breeze of 22 kph from the west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 86% chance of some rain86
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 22 kph from the West22
    kph wind from W

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Portsmouth weather for Wednesday 16th April 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 9°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the west.

  • 9°C maximum temperature9
    °C maximum temperature
  • 3°C minimum temperature3
    °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
  • 5°C wind chill5
    °C wind chill
  • Moderate breeze of 25 kph from the West25
    kph wind from W

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Portsmouth weather for Thursday 17th April 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 11°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the west.

  • 11°C maximum temperature11
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 23 kph from the West23
    kph wind from W

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Portsmouth weather for Friday 18th April 2025

Expect scattered clouds in Portsmouth, New Hampshire with a maximum temperature of 15°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

  • 15°C maximum temperature15
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 16 kph from the South16
    kph wind from S

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Portsmouth weather for Saturday 19th April 2025

Expect mostly cloudy with light rain in Portsmouth, New Hampshire with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 49% chance of some rain and a moderate breeze of 22 kph from the south-west.

  • 21°C maximum temperature21
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 49% chance of some rain49
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 21°C wind chill21
    °C wind chill
  • Moderate breeze of 22 kph from the South-West22
    kph wind from SW

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

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