Foster City Weather Forecast

    • 58
    • 81

    Mostly Sunny

    • 55
    • 74

    Mostly Sunny

    • 55
    • 71

    Partly Sunny

    • 56
    • 72

    Mostly Cloudy

    • 57
    • 72

    Mostly Cloudy

    • 58
    • 73

    Mostly Cloudy

Today 15 Jul San Francisco Bay Shoreline

Sunny. Highs in the 70s to mid 80s. West Winds 10 to 20 Mph.

Tonight 15 Jul San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s. West Winds 10 to 20 Mph.

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Foster City Temperature Statistics

July Temperature

San Carlos Airport (3.1 miles)

  • Lowest 1 July, 2026

    55.4 °F

  • Average July

    61.5 °F

  • Highest 13 July, 2026

    82.4 °F

Climate (2021–2026)

San Carlos Airport (3.1 miles)

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  • Average Low 2021–2026

    51.7 °F

  • Average 2021–2026

    56.9 °F

  • Average High 2021–2026

    68.3 °F
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