Coupeville Weather Forecast

    • 51
    • 65

    Mostly Sunny

    • 51
    • 66

    Mostly Sunny

    • 54
    • 66

    Rain

    • 51
    • 64

    Chance Rain

    • 52
    • 64

    Chance Rain

    • 54
    • 65

    Chance Rain

Today 18 Sep Island County

Mostly sunny. Highs in the 60s to lower 70s. Northwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 18 Sep Island County

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 Real-Time

Coupeville Temperature Statistics

September Temperature

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

  • Lowest 16 September, 2025

    48 °F

  • Average September

    57.3 °F

  • Highest 16 September, 2025

    86 °F

Climate (2020–Present)

Whidbey Island Naval Air Station - Ault Field (8.7 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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