Swinomish Channel - Shelter Bay Weather Forecast

    • 52
    • 65

    Increasing Clouds

    • 50
    • 64

    Mostly Cloudy

    • 51
    • 61

    Rain

    • 50
    • 60

    Chance Rain

    • 48
    • 61

    Mostly Cloudy

    • 49
    • 61

    Chance Rain

Today 22 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly cloudy in the morning then becoming mostly sunny. Highs in the 60s. Light wind becoming southwest to 10 Mph in the afternoon.

Tonight 22 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly cloudy. A slight chance of rain in the morning. Lows in the upper 40s to mid 50s. South wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

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Swinomish Channel - Shelter Bay Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (6.8 miles)

  • Lowest 18 September, 2026

    45 °F

  • Average September

    56.8 °F

  • Highest 7 September, 2026

    69.1 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (6.8 miles)

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  • Average Low 2021–2026

    44.4 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    55.9 °F
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