San Juan Island - Friday Harbor Weather Forecast

    • 54
    • 75

    Mostly Sunny

    • 55
    • 76

    Partly Sunny

    • 54
    • 75

    Rain Showers Likely

    • 54
    • 73

    Mostly Sunny

    • 55
    • 74

    Mostly Sunny

    • 56
    • 74

    Mostly Sunny

Today 14 Jul San Juan County

Sunny. Highs in the 70s. Light wind.

Tonight 14 Jul San Juan County

Mostly clear. Lows in the 50s. Southwest wind to 10 Mph becoming southeast after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Friday Harbor Temperature Statistics

July Temperature

Friday Harbor Airport (1.9 miles)

  • Lowest 5 July, 2026

    46.9 °F

  • Average July

    58.6 °F

  • Highest 6 July, 2026

    75 °F

Climate (2021–2026)

Friday Harbor Airport (1.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.7 °F
Get WillyWeather+ to remove ads