Foster City Weather Forecast

    • 54
    • 66

    Increasing Clouds

    • 55
    • 73

    Decreasing Clouds

    • 56
    • 73

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

    • 58
    • 73

    Mostly Cloudy

    • 57
    • 72

    Chance Rain

Today 30 Oct San Francisco Bay Shoreline

Partly cloudy. Highs in the mid 60s to lower 70s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 30 Oct San Francisco Bay Shoreline

Mostly cloudy in the evening then becoming partly cloudy. Lows in the lower 50s. West Winds 10 to 20 Mph. Becoming south 10 to 15 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Foster City Temperature Statistics

October Temperature

San Carlos Airport (3.1 miles)

  • Lowest 14 October, 2025

    48.2 °F

  • Average October

    61.1 °F

  • Highest 6 October, 2025

    86 °F

Climate (2020–Present)

San Carlos Airport (3.1 miles)

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

  • Average Low 2020–2025

    51.2 °F

  • Average 2020–2025

    56.5 °F

  • Average High 2020–2025

    68.1 °F
Get WillyWeather+ to remove ads