Blakely Island - Thatcher Bay Weather Forecast

    • 54
    • 71

    Gradual Clearing

    • 54
    • 69

    Partly Sunny

    • 55
    • 69

    Mostly Sunny

    • 56
    • 70

    Mostly Sunny

    • 56
    • 71

    Partly Sunny

    • 58
    • 73

    Mostly Sunny

Today 8 Aug San Juan County

Cloudy in the morning then becoming partly sunny. Highs in the 70s. Light wind.

Tonight 8 Aug San Juan County

Partly cloudy. Lows in the 50s. Southwest wind to 10 Mph with Gusts to 20 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Blakely Island - Thatcher Bay Temperature Statistics

August Temperature

Friday Harbor Airport (9.3 miles)

  • Lowest 3 August, 2026

    48.9 °F

  • Average August

    62.6 °F

  • Highest 4 August, 2026

    78.1 °F

Climate (2021–2026)

Friday Harbor Airport (9.3 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