Blakely Island - Thatcher Bay Weather Forecast

    • 56
    • 71

    Increasing Clouds

    • 56
    • 70

    Becoming Sunny

    • 57
    • 72

    Mostly Sunny

    • 56
    • 71

    Mostly Sunny

    • 55
    • 68

    Partly Sunny

    • 55
    • 68

    Partly Sunny

    • 55
    • 69

    Mostly Sunny

Today 21 Jul San Juan County

Sunny. Highs in the upper 60s to mid 70s. Light wind becoming south to 10 Mph in the afternoon.

Tonight 21 Jul San Juan County

Mostly clear. Lows in the 50s. South wind to 10 Mph. Gusts to 20 Mph after midnight.

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  • Temperature Real-Time

Blakely Island - Thatcher Bay Temperature Statistics

July Temperature

Friday Harbor Airport (9.3 miles)

  • Lowest 4 July, 2025

    46.7 °F

  • Average July

    62.5 °F

  • Highest 15 July, 2025

    88.6 °F

Climate (2020–Present)

Friday Harbor Airport (9.3 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.5 °F
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