Columbia River - Grassy Island Weather Forecast

    • 57
    • 67

    Slight Chance Thunderstorms

    • 58
    • 65

    Increasing Clouds

    • 57
    • 66

    Partly Sunny

    • 58
    • 73

    Mostly Sunny

    • 57
    • 68

    Mostly Cloudy

    • 55
    • 65

    Mostly Cloudy

    • 55
    • 64

    Mostly Cloudy

Today 21 Aug Clatsop County Coast

Cloudy. Highs around 70. Southwest wind 5 to 10 Mph.

Tonight 21 Aug Clatsop County Coast

Mostly cloudy with a 20 percent chance of Showers. Lows in the mid 50s. Southwest wind 5 to 10 Mph.

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Columbia River - Grassy Island Temperature Statistics

August Temperature

Astoria, Astoria Regional Airport (18.6 miles)

  • Lowest 3 August, 2026

    48.7 °F

  • Average August

    63.3 °F

  • Highest 5 August, 2026

    82.7 °F

Climate (2021–2026)

Astoria, Astoria Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    59.9 °F
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