Mare Island Shoreline Heritage Preserve Weather Forecast

    • 60
    • 79

    Sunny

    • 61
    • 80

    Mostly Sunny

    • 62
    • 70

    Chance Rain Showers

    • 61
    • 72

    Slight Chance Rain Showers

    • 60
    • 71

    Mostly Sunny

    • 60
    • 72

    Mostly Sunny

Today 16 Sep Carquinez Strait and Delta

Sunny. Highs 89 to 95. West Winds up to 10 Mph.

Tonight 16 Sep Carquinez Strait and Delta

Clear. Lows 59 to 65. West Winds up to 10 Mph with Gusts to around 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mare Island Shoreline Heritage Preserve Temperature Statistics

September Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 3 September, 2025

    52 °F

  • Average September

    65.7 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

Napa, Napa County Airport (8.7 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.5 °F
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