Foster City Weather Forecast

    • 58
    • 90

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

    • 57
    • 79

    Partly Sunny

    • 53
    • 68

    Breezy

    • 54
    • 71

    Mostly Sunny

    • 55
    • 74

    Mostly Sunny

    • 54
    • 73

    Mostly Sunny

Today 7 Oct San Francisco Bay Shoreline

Sunny. Highs in the 80s to lower 90s. Light Winds. Becoming northwest 5 to 15 Mph in the afternoon.

Tonight 7 Oct San Francisco Bay Shoreline

Mostly clear. Lows in the upper 50s. West Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

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Foster City Temperature Statistics

October Temperature

San Carlos Airport (3.1 miles)

  • Lowest 1 October, 2026

    57.2 °F

  • Average October

    65.3 °F

  • Highest 5 October, 2026

    82.4 °F

Climate (2021–2026)

San Carlos Airport (3.1 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    57 °F

  • Average High 2021–2026

    68.2 °F
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