Portsmouth weather live forecast

Tomorrow's maximum temperature in Portsmouth is expected to be 16°C.

5-day weather forecast updated at 04:03 on Saturday 14th June 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 14th June 2025

Expect mostly cloudy with light rain in Portsmouth, New Hampshire with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 52% chance of some rain and a light breeze of 12 kph from the east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 12°C minimum temperature12
    °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)
  • 52% chance of some rain52
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 12 kph from the East12
    kph wind from E

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Portsmouth weather for Sunday 15th June 2025

Expect overcast skies in Portsmouth, New Hampshire with a maximum temperature of 18°C, maximum UV of 8 (Very High) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south-east.

  • 18°C maximum temperature18
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Overcast skies
    overcast skies
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 18°C wind chill18
    °C wind chill
  • Light breeze of 11 kph from the South-East11
    kph wind from SE

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Portsmouth weather for Monday 16th June 2025

Expect overcast skies in Portsmouth, New Hampshire with a maximum temperature of 21°C, maximum UV of 7 (High) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-east.

  • 21°C maximum temperature21
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Overcast skies
    overcast skies
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 21°C wind chill21
    °C wind chill
  • Gentle breeze of 14 kph from the South-East14
    kph wind from SE

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Portsmouth weather for Tuesday 17th June 2025

Expect broken clouds in Portsmouth, New Hampshire with a maximum temperature of 23°C, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

  • 23°C maximum temperature23
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very 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 Wednesday 18th June 2025

Expect isolated thunderstorms in Portsmouth, New Hampshire with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 42% chance of some rain and a gentle breeze of 15 kph from the south.

  • 27°C maximum temperature27
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 42% chance of some rain42
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 15 kph from the South15
    kph wind from S

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  • Destinations across Europe, Americas, Asia, Africa & beyond
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Metric (°C / mm)  |  Imperial (°F / inches)

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