San Francisco Bay - Greco Island Weather Forecast

    • 55
    • 63

    Increasing Clouds

    • 56
    • 63

    Mostly Sunny

    • 57
    • 65

    Mostly Sunny

    • 57
    • 66

    Mostly Sunny

    • 55
    • 64

    Mostly Sunny

    • 56
    • 62

    Partly Sunny

    • 54
    • 61

    Mostly Sunny

Today 21 Jun San Francisco Bay Shoreline

Sunny. Highs in the 60s to upper 70s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 21 Jun San Francisco Bay Shoreline

Mostly clear in the evening then becoming mostly cloudy. Lows in the mid 50s. West Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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San Francisco Bay - Greco Island Temperature Statistics

June Temperature

San Carlos Airport (3.7 miles)

  • Lowest 7 June, 2026

    51.8 °F

  • Average June

    62.9 °F

  • Highest 11 June, 2026

    96.8 °F

Climate (2021–2026)

San Carlos Airport (3.7 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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