Marthas Bay Weather Forecast

    • 53
    • 66

    Becoming Sunny

    • 51
    • 63

    Becoming Sunny

    • 52
    • 64

    Mostly Sunny

    • 55
    • 64

    Rain

    • 51
    • 62

    Chance Rain

    • 51
    • 63

    Slight Chance Rain

    • 53
    • 62

    Chance Rain

Today 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Highs in the mid 60s to lower 70s. Southwest wind to 10 Mph becoming west in the afternoon.

Tonight 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows in the upper 40s to mid 50s. Northwest wind 10 to 15 Mph decreasing to 10 Mph or less after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marthas Bay Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (6.2 miles)

  • Lowest 10 September, 2025

    50 °F

  • Average September

    57 °F

  • Highest 13 September, 2025

    66.9 °F

Climate (2020–Present)

Whidbey Island Naval Air Station - Ault Field (6.2 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    56.1 °F
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