Lopez Island - McArdle Bay Weather Forecast

    • 49
    • 59

    Chance Rain

    • 50
    • 57

    Mostly Cloudy

    • 50
    • 58

    Mostly Cloudy

    • 50
    • 59

    Partly Sunny

    • 51
    • 60

    Partly Sunny

    • 51
    • 61

    Partly Sunny

Today 29 Sep San Juan County

Rain late in the Morning, then a chance of rain early in the afternoon. A slight chance of rain late in the afternoon. Rainfall Amounts a quarter to a half inch possible. Highs in the mid 50s to lower 60s. South wind 10 to 15 Mph becoming southwest in the afternoon.

Tonight 29 Sep San Juan County

Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s to lower 50s. Southwest wind 10 to 15 Mph becoming west after midnight.

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  • Temperature Real-Time

Lopez Island - McArdle Bay Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (8.7 miles)

  • Lowest 27 September, 2026

    41 °F

  • Average September

    56.1 °F

  • Highest 7 September, 2026

    69.1 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (8.7 miles)

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  • Average Low 2021–2026

    44.4 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    55.9 °F
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