Foster City Weather Forecast

    • 46
    • 65

    Partly Sunny

    • 54
    • 67

    Chance Rain

    • 55
    • 65

    Rain

    • 51
    • 66

    Slight Chance Rain

    • 52
    • 69

    Mostly Cloudy

    • 53
    • 70

    Mostly Cloudy

    • 52
    • 69

    Mostly Cloudy

Today 22 Feb San Francisco Bay Shoreline

Partly cloudy. Highs in the mid 60s. South Winds 5 to 10 Mph.

Tonight 22 Feb San Francisco Bay Shoreline

Partly cloudy. Patchy fog after midnight. Lows in the mid 40s. Southeast Winds 5 to 10 Mph in the evening. Becoming light.

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Foster City Temperature Statistics

February Temperature

San Carlos Airport (3.1 miles)

  • Lowest 18 February, 2026

    39.2 °F

  • Average February

    51.8 °F

  • Highest 8 February, 2026

    69.8 °F

Climate (2021–Present)

San Carlos Airport (3.1 miles)

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  • Average Low 2021–2026

    51.4 °F

  • Average 2021–2026

    56.7 °F

  • Average High 2021–2026

    68.1 °F
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