Carquinez Strait - Mare Island Weather Forecast

    • 46
    • 56

    Becoming Sunny

    • 45
    • 57

    Partly Sunny

    • 46
    • 58

    Mostly Sunny

    • 47
    • 58

    Partly Sunny

    • 47
    • 59

    Partly Sunny

    • 46
    • 59

    Mostly Sunny

Today 29 Nov Carquinez Strait and Delta

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. Highs around 53. Light Winds.

Tonight 29 Nov Carquinez Strait and Delta

Partly cloudy. Lows 39 to 44. Light Winds.

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Carquinez Strait - Mare Island Temperature Statistics

November Temperature

Napa, Napa County Airport (9.3 miles)

  • Lowest 22 November, 2025

    39 °F

  • Average November

    55.7 °F

  • Highest 10 November, 2025

    79 °F

Climate (2020–Present)

Napa, Napa County Airport (9.3 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.2 °F
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