Shell Beach Weather Forecast

    • 59
    • 66

    Mostly Sunny

    • 60
    • 77

    Mostly Sunny

    • 60
    • 73

    Partly Sunny

    • 59
    • 73

    Partly Sunny

    • 57
    • 69

    Partly Sunny

    • 56
    • 64

    Mostly Sunny

    • 58
    • 68

    Mostly Sunny

Today 22 Sep San Luis Obispo County Beaches

Sunny. Highs from the upper 60s to mid 70s at the Beaches to the lower to mid 80s inland.

Tonight 22 Sep San Luis Obispo County Beaches

Mostly clear in the evening then Areas of low Clouds and fog. Lows in the mid to upper 50s. Northwest Winds around 15 Mph in the evening.

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Shell Beach Temperature Statistics

September Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (5.6 miles)

  • Lowest 7 September, 2026

    49.6 °F

  • Average September

    69.1 °F

  • Highest 9 September, 2026

    107.7 °F

Climate (2021–2026)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (5.6 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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