Fort Casey Weather Forecast

    • 53
    • 65

    Decreasing Clouds

    • 52
    • 69

    Mostly Sunny

    • 52
    • 70

    Mostly Sunny

    • 52
    • 69

    Partly Sunny

    • 52
    • 63

    Partly Sunny

    • 52
    • 63

    Partly Sunny

Today 15 Sep Island County

Mostly cloudy with a slight chance of Showers in the Morning, then mostly sunny in the afternoon. Highs in the 60s. Northwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 15 Sep Island County

Mostly clear. Lows near 50. Northwest wind 10 to 15 Mph decreasing to 10 Mph or less after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fort Casey Temperature Statistics

September Temperature

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

  • Lowest 6 September, 2026

    46.9 °F

  • Average September

    57.5 °F

  • Highest 7 September, 2026

    69.1 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (13 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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