Seaquest State Park Weather Forecast

    • 50
    • 76

    Increasing Clouds

    • 48
    • 72

    Partly Sunny

    • 49
    • 76

    Mostly Sunny

    • 54
    • 73

    Chance Rain

    • 49
    • 69

    Slight Chance Rain

    • 51
    • 73

    Partly Sunny

Today 17 Sep South Washington Cascade Foothills

Sunny. Highs in the upper 70s. Northwest wind 5 to 10 Mph.

Tonight 17 Sep South Washington Cascade Foothills

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

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Seaquest State Park Temperature Statistics

September Temperature

Southwest Washington Regional Airport (13 miles)

  • Lowest 15 September, 2025

    45 °F

  • Average September

    65.2 °F

  • Highest 2 September, 2025

    88 °F

Climate (2020–Present)

Southwest Washington Regional Airport (13 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.3 °F
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