Grover Beach Weather Forecast

    • 55
    • 69

    Increasing Clouds

    • 56
    • 66

    Mostly Cloudy

    • 55
    • 66

    Partly Sunny

    • 56
    • 68

    Mostly Sunny

    • 57
    • 69

    Partly Sunny

    • 56
    • 65

    Partly Sunny

Today 15 Sep San Luis Obispo County Beaches

Areas of low Clouds and fog in the morning then partly cloudy. Highs from the mid to upper 60s at the Beaches to the mid 70s to around 80 inland. West Winds around 15 Mph in the afternoon.

Tonight 15 Sep San Luis Obispo County Beaches

Low Clouds and fog. Lows in the lower to mid 50s.

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Grover Beach Temperature Statistics

September Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (7.5 miles)

  • Lowest 7 September, 2026

    49.6 °F

  • Average September

    70.5 °F

  • Highest 9 September, 2026

    107.7 °F

Climate (2021–2026)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (7.5 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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