Portland weather live forecast

Today's maximum temperature in Portland is expected to be 21°C. Select a day from the live weather forecast for Portland, Maine, USA for more weather parameters.

5-day weather forecast updated at 04:01 on Friday 29th August 2025 GMT

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The 5-day weather forecast for Maine (Portland) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Portland weather forecast by day

Below are the detailed weather forecasts for Portland for the next 5 days.

Portland weather for Friday 29th August 2025

Expect isolated thunderstorms in Portland, Maine with a maximum temperature of 21°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 89% chance of some rain and a gentle breeze of 19 kph from the south.

  • 21°C maximum temperature21
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 89% chance of some rain89
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 21°C wind chill21
    °C wind chill
  • Gentle breeze of 19 kph from the South19
    kph wind from S

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Portland weather for Saturday 30th August 2025

Expect broken clouds in Portland, Maine with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

  • 20°C maximum temperature20
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 20°C wind chill20
    °C wind chill
  • Light breeze of 11 kph from the North-West11
    kph wind from NW

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Portland weather for Sunday 31st August 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of 22°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

  • 22°C maximum temperature22
    °C maximum temperature
  • 12°C minimum temperature12
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 7 hours of bright sunshine7
    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 9 kph from the North-West9
    kph wind from NW

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Portland weather for Monday 1st September 2025

Expect broken clouds in Portland, Maine with a maximum temperature of 23°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 north.

  • 23°C maximum temperature23
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Broken clouds
    broken 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
  • 23°C wind chill23
    °C wind chill
  • Light breeze of 10 kph from the North10
    kph wind from N

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Portland weather for Tuesday 2nd September 2025

Expect broken clouds in Portland, Maine with a maximum temperature of 22°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.

  • 22°C maximum temperature22
    °C maximum temperature
  • 13°C minimum temperature13
    °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
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 12 kph from the South12
    kph wind from S

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

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