Port San Luis Weather Forecast

    • 60
    • 75

    Partly Sunny

    • 58
    • 73

    Partly Sunny

    • 57
    • 63

    Mostly Sunny

    • 59
    • 66

    Mostly Sunny

    • 60
    • 73

    Mostly Sunny

    • 60
    • 73

    Mostly Sunny

Today 25 Sep San Luis Obispo County Beaches

Low Clouds and fog in the morning then partly cloudy. Highs from the upper 60s to mid 70s at the Beaches to the lower to mid 80s inland. Northwest Winds around 15 Mph in the afternoon.

Tonight 25 Sep San Luis Obispo County Beaches

Low Clouds and fog developing. Lows in the 50s to around 60. Northwest Winds around 15 Mph in the evening.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Port San Luis 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

    68.9 °F

  • Highest 9 September, 2026

    107.7 °F

Climate (2021–2026)

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

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    61.1 °F

  • Average High 2021–2026

    73.3 °F
Get WillyWeather+ to remove ads