San Francisco Bay - Coyote Hills Slough Entrance Weather Forecast

    • 58
    • 67

    Mostly Cloudy

    • 58
    • 69

    Decreasing Clouds

    • 57
    • 70

    Partly Sunny

    • 60
    • 75

    Mostly Sunny

    • 60
    • 73

    Partly Sunny

    • 58
    • 69

    Partly Sunny

    • 57
    • 68

    Partly Sunny

Today 20 Sep San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Highs in the 60s to upper 70s.

Tonight 20 Sep San Francisco Bay Shoreline

Mostly cloudy. Lows in the upper 50s. West Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Bay - Coyote Hills Slough Entrance Temperature Statistics

September Temperature

Hayward, Hayward Air Terminal (6.2 miles)

  • Lowest 7 September, 2026

    55.7 °F

  • Average September

    68.2 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Hayward, Hayward Air Terminal (6.2 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    69.2 °F
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