Carquinez Strait - Mare Island Weather Forecast

    • 46
    • 61

    Mostly Sunny

    • 46
    • 60

    Mostly Sunny

    • 45
    • 61

    Mostly Sunny

    • 45
    • 59

    Mostly Sunny

    • 45
    • 59

    Partly Sunny

    • 46
    • 58

    Partly Sunny

Today 14 Jan Carquinez Strait and Delta

Mostly cloudy in the morning then clearing. Widespread fog. Locally dense in the Morning, then patchy dense fog in the afternoon. Highs around 57. Northeast Winds up to 10 Mph.

Tonight 14 Jan Carquinez Strait and Delta

Mostly clear. Patchy fog. Lows around 40. Light Winds.

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Carquinez Strait - Mare Island Temperature Statistics

January Temperature

Napa, Napa County Airport (9.3 miles)

  • Lowest 9 January, 2026

    32 °F

  • Average January

    50.7 °F

  • Highest 2 January, 2026

    61 °F

Climate (2021–Present)

Napa, Napa County Airport (9.3 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    70.1 °F
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