San Francisco Bay - Alameda Creek Entrance Weather Forecast

    • 56
    • 68

    Increasing Clouds

    • 57
    • 70

    Becoming Sunny

    • 56
    • 68

    Partly Sunny

    • 59
    • 75

    Mostly Sunny

    • 61
    • 72

    Partly Sunny

    • 63
    • 70

    Slight Chance Rain

    • 61
    • 71

    Slight Chance Rain

Today 4 Sep San Francisco Bay Shoreline

Sunny. Highs in the upper 60s to mid 70s. West Winds 10 to 20 Mph.

Tonight 4 Sep San Francisco Bay Shoreline

Mostly clear. Lows in the upper 50s. West Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Bay - Alameda Creek Entrance Temperature Statistics

September Temperature

Hayward, Hayward Air Terminal (4.3 miles)

  • Lowest 2 September, 2026

    59 °F

  • Average September

    65.7 °F

  • Highest 2 September, 2026

    73 °F

Climate (2021–2026)

Hayward, Hayward Air Terminal (4.3 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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