San Gregorio State Beach Weather Forecast

    • 55
    • 63

    Increasing Clouds

    • 56
    • 63

    Mostly Cloudy

    • 56
    • 63

    Mostly Cloudy

    • 56
    • 62

    Cloudy

    • 56
    • 62

    Mostly Cloudy

    • 56
    • 63

    Mostly Cloudy

Today 17 Sep San Francisco Peninsula Coast

Mostly cloudy late in the morning then becoming partly cloudy. Highs in the upper 60s. Southwest Winds around 5 Mph.

Tonight 17 Sep San Francisco Peninsula Coast

Mostly cloudy. Patchy fog in the evening. Areas of fog after midnight. Lows in the 50s. Northwest Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

San Gregorio State Beach Temperature Statistics

September Temperature

Half Moon Bay Airport (14.3 miles)

  • Lowest 8 September, 2026

    50 °F

  • Average September

    62.2 °F

  • Highest 9 September, 2026

    89.6 °F

Climate (2021–2026)

Half Moon Bay Airport (14.3 miles)

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

  • Average Low 2021–2026

    48.8 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    61.1 °F
Get WillyWeather+ to remove ads