Brannan Island State Recreation Area Weather Forecast

    • 66
    • 80

    Chance Rain Showers

    • 64
    • 73

    Chance Rain Showers

    • 64
    • 77

    Sunny

    • 65
    • 80

    Sunny

    • 67
    • 85

    Mostly Sunny

    • 66
    • 78

    Slight Chance Rain Showers

Today 18 Sep Carquinez Strait and Delta

Mostly cloudy. Highs 82 to 88. Southwest Winds 10 to 15 Mph.

Tonight 18 Sep Carquinez Strait and Delta

Mostly cloudy with a slight chance of rain Showers. Lows 61 to 67. Southwest Winds up to 10 Mph with Gusts to around 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brannan Island State Recreation Area Temperature Statistics

September Temperature

Stockton, Stockton Metropolitan Airport (20.5 miles)

  • Lowest 11 September, 2025

    55.9 °F

  • Average September

    73.8 °F

  • Highest 1 September, 2025

    102.9 °F

Climate (2020–Present)

Stockton, Stockton Metropolitan Airport (20.5 miles)

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  • Average Low 2020–2025

    49.9 °F

  • Average 2020–2025

    62.9 °F

  • Average High 2020–2025

    77.4 °F
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