Portsmouth weather live forecast

Tomorrow's maximum temperature in Portsmouth is expected to be 57°F.

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 57°F, 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 14 mph from the west.

  • 57°F maximum temperature57
    °F maximum temperature
  • 43°F minimum temperature43
    °F 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 14 mph from the West14
    mph 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 48°F, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the west.

  • 48°F maximum temperature48
    °F maximum temperature
  • 37°F minimum temperature37
    °F 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
  • 41°F wind chill41
    °F wind chill
  • Moderate breeze of 16 mph from the West16
    mph 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 52°F, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the west.

  • 52°F maximum temperature52
    °F maximum temperature
  • 37°F minimum temperature37
    °F 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 14 mph from the West14
    mph 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 59°F, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the south.

  • 59°F maximum temperature59
    °F maximum temperature
  • 36°F minimum temperature36
    °F 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 10 mph from the South10
    mph 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 70°F, 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 14 mph from the south-west.

  • 70°F maximum temperature70
    °F maximum temperature
  • 48°F minimum temperature48
    °F 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
  • 70°F wind chill70
    °F wind chill
  • Moderate breeze of 14 mph from the South-West14
    mph wind from SW

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Expires at 23:59 on Wednesday 31st Dec 2025

Metric (°C)  |  Imperial (°F)

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