Fort Casey Weather Forecast

    • 46
    • 62

    Mostly Cloudy

    • 49
    • 62

    Mostly Cloudy

    • 49
    • 64

    Mostly Cloudy

    • 48
    • 60

    Chance Rain

    • 46
    • 58

    Chance Rain

    • 46
    • 58

    Partly Sunny

Today 18 Apr Island County

Mostly sunny. Highs in the 60s. Light wind.

Tonight 18 Apr Island County

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fort Casey Temperature Statistics

April Temperature

Whidbey Island Naval Air Station - Ault Field (13 miles)

  • Lowest 8 April, 2026

    34 °F

  • Average April

    47.2 °F

  • Highest 6 April, 2026

    57.9 °F

Climate (2021–Present)

Whidbey Island Naval Air Station - Ault Field (13 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    56.1 °F
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