San Francisco Bay - Guadalupe Slough Entrance Weather Forecast

    • 63
    • 78

    Chance Rain Showers

    • 62
    • 76

    Chance Rain Showers

    • 61
    • 76

    Mostly Sunny

    • 61
    • 78

    Mostly Sunny

    • 64
    • 84

    Partly Sunny

    • 63
    • 78

    Slight Chance Rain Showers

Today 18 Sep San Francisco Bay Shoreline

Mostly cloudy. A slight chance of Showers in the Morning, then a chance of Showers and isolated Thunderstorms in the afternoon. Highs in the mid 70s to lower 80s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 18 Sep San Francisco Bay Shoreline

Mostly cloudy. A chance of Showers and isolated Thunderstorms. Lows in the mid 60s. West Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Bay - Guadalupe Slough Entrance Temperature Statistics

September Temperature

Palo Alto Airport (4.3 miles)

  • Lowest 1 September, 2025

    57.2 °F

  • Average September

    69.8 °F

  • Highest 15 September, 2025

    84.2 °F

Climate (2020–Present)

Palo Alto Airport (4.3 miles)

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  • Average Low 2020–2025

    50.9 °F

  • Average 2020–2025

    60.5 °F

  • Average High 2020–2025

    67.2 °F
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