Seaside Weather Forecast

    • 51
    • 63

    Mostly Cloudy

    • 50
    • 62

    Mostly Cloudy

    • 52
    • 62

    Rain Likely

    • 50
    • 60

    Chance Rain Showers

    • 49
    • 62

    Mostly Cloudy

    • 50
    • 61

    Partly Sunny

Today 22 Sep Clatsop County Coast

Partly sunny. Highs in the mid 60s. Northwest wind 5 to 10 Mph.

Tonight 22 Sep Clatsop County Coast

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 50. Winds light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Seaside Temperature Statistics

September Temperature

Astoria, Astoria Regional Airport (11.2 miles)

  • Lowest 16 September, 2026

    45.6 °F

  • Average September

    60.2 °F

  • Highest 9 September, 2026

    77.6 °F

Climate (2021–2026)

Astoria, Astoria Regional Airport (11.2 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    59.9 °F
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