South Reservoir Weather Forecast

    • 58
    • 82

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 56
    • 69

    Mostly Cloudy

    • 55
    • 71

    Mostly Cloudy

    • 58
    • 70

    Chance Rain

    • 55
    • 67

    Rain Likely

Today 20 Oct San Francisco Bay Shoreline

Sunny. Highs around 80. East Winds 5 to 10 Mph. Becoming north 5 to 15 Mph in the afternoon.

Tonight 20 Oct San Francisco Bay Shoreline

Mostly clear. Lows in the upper 50s. North Winds 5 to 10 Mph. Becoming northeast after midnight.

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South Reservoir Temperature Statistics

October Temperature

Hayward, Hayward Air Terminal (2.5 miles)

  • Lowest 14 October, 2025

    50 °F

  • Average October

    62.5 °F

  • Highest 6 October, 2025

    84 °F

Climate (2020–Present)

Hayward, Hayward Air Terminal (2.5 miles)

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  • Average Low 2020–2025

    52 °F

  • Average 2020–2025

    59.2 °F

  • Average High 2020–2025

    68.9 °F
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