Cayucos State Beach Weather Forecast

    • 51
    • 65

    Sunny

    • 51
    • 66

    Sunny

    • 53
    • 60

    Sunny

    • 53
    • 61

    Mostly Sunny

    • 53
    • 61

    Mostly Sunny

    • 54
    • 65

    Partly Sunny

Today 4 Dec San Luis Obispo County Beaches

Sunny. Highs in the mid 60s to around 70. Northeast Winds around 15 Mph in the morning.

Tonight 4 Dec San Luis Obispo County Beaches

Clear. Lows in the mid 30s to mid 40s except the mid 40s to around 50 in the Hills. North Winds around 15 Mph shifting to the northeast after midnight.

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Cayucos State Beach Temperature Statistics

December Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (20.5 miles)

  • Lowest 2 December, 2025

    39.9 °F

  • Average December

    51.7 °F

  • Highest 2 December, 2025

    69.1 °F

Climate (2020–Present)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (20.5 miles)

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  • Average Low 2020–2025

    49.9 °F

  • Average 2020–2025

    60.3 °F

  • Average High 2020–2025

    72.8 °F
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