Blakely Island - Thatcher Bay Weather Forecast

    • 49
    • 60

    Increasing Clouds

    • 51
    • 65

    Mostly Cloudy

    • 50
    • 65

    Partly Sunny

    • 51
    • 66

    Partly Sunny

    • 52
    • 68

    Mostly Cloudy

    • 52
    • 68

    Partly Sunny

Today 8 May San Juan County

Mostly cloudy until late afternoon then becoming mostly sunny. Highs in the upper 50s to mid 60s. Southwest wind 10 to 15 Mph becoming south 10 to 20 Mph in the afternoon.

Tonight 8 May San Juan County

Partly cloudy. Lows in the mid 40s to lower 50s. Southwest wind to 10 Mph in the evening becoming light.

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Blakely Island - Thatcher Bay Temperature Statistics

May Temperature

Friday Harbor Airport (9.3 miles)

  • Lowest 1 May, 2026

    45 °F

  • Average May

    57.6 °F

  • Highest 3 May, 2026

    75.9 °F

Climate (2021–Present)

Friday Harbor Airport (9.3 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.7 °F
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