Seaside Weather Forecast

    • 54
    • 78

    Mostly Sunny

    • 55
    • 63

    Mostly Cloudy

    • 52
    • 62

    Partly Sunny

    • 53
    • 62

    Mostly Cloudy

    • 56
    • 61

    Chance Rain

    • 53
    • 61

    Chance Rain

Today 16 Sep Clatsop County Coast

Sunny. Highs in the mid 80s. East wind 10 to 15 Mph, becoming south this afternoon.

Tonight 16 Sep Clatsop County Coast

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. Southwest wind 5 to 10 Mph.

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Seaside Temperature Statistics

September Temperature

Astoria, Astoria Regional Airport (11.2 miles)

  • Lowest 2 September, 2025

    51.1 °F

  • Average September

    61.2 °F

  • Highest 2 September, 2025

    73.9 °F

Climate (2020–Present)

Astoria, Astoria Regional Airport (11.2 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    59.5 °F
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