Cayucos State Beach Weather Forecast

    • 57
    • 66

    Partly Sunny

    • 53
    • 64

    Mostly Cloudy

    • 52
    • 57

    Partly Sunny

    • 57
    • 65

    Mostly Sunny

    • 60
    • 72

    Mostly Sunny

    • 59
    • 75

    Partly Sunny

    • 58
    • 72

    Mostly Sunny

Today 25 Sep San Luis Obispo County Beaches

Partly cloudy in the morning then sunny. Highs in the upper 60s to mid 70s.

Tonight 25 Sep San Luis Obispo County Beaches

Patchy low Clouds and fog in the evening then mostly cloudy. Lows in the mid 50s to around 60. Northwest Winds around 15 Mph in the evening.

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Cayucos State Beach Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2026

    49.6 °F

  • Average September

    68.9 °F

  • Highest 9 September, 2026

    107.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    61.1 °F

  • Average High 2021–2026

    73.3 °F
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