Friday Harbor weather live forecast

Today's maximum temperature in Friday Harbor is expected to be 20°C. Select a day from the live weather forecast for Friday Harbor, Washington State, USA for more weather parameters.

5-day weather forecast updated at 04:01 on Friday 15th August 2025 GMT

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

Friday Harbor weather forecast by day

Below are the detailed weather forecasts for Friday Harbor for the next 5 days.

Friday Harbor weather for Friday 15th August 2025

Expect cloudy with some rain in Friday Harbor, Washington State with a maximum temperature of 20°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 100% chance of some rain and a gentle breeze of 15 kph from the south-east.

  • 20°C maximum temperature20
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Cloudy with some rain
    cloudy with some rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 100% chance of some rain100
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 15 kph from the South-East15
    kph wind from SE

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Friday Harbor weather for Saturday 16th August 2025

Expect mostly cloudy with light rain in Friday Harbor, Washington State with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 39% chance of some rain and a light breeze of 9 kph from the south-west.

  • 22°C maximum temperature22
    °C maximum temperature
  • 12°C minimum temperature12
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 39% chance of some rain39
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Light breeze of 9 kph from the South-West9
    kph wind from SW

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Friday Harbor weather for Sunday 17th August 2025

Expect sunshine and showers in Friday Harbor, Washington State with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 16% chance of some rain and a light breeze of 7 kph from the south.

  • 21°C maximum temperature21
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 16% chance of some rain16
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 kph from the South7
    kph wind from S

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Friday Harbor weather for Monday 18th August 2025

Expect broken clouds in Friday Harbor, Washington State with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south.

  • 21°C maximum temperature21
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 8 kph from the South8
    kph wind from S

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Friday Harbor weather for Tuesday 19th August 2025

Expect scattered clouds in Friday Harbor, Washington State with a maximum temperature of 22°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south-west.

  • 22°C maximum temperature22
    °C maximum temperature
  • 11°C minimum temperature11
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Light breeze of 8 kph from the South-West8
    kph wind from SW

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

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