Carquinez Strait - Mare Island Weather Forecast

    • 53
    • 70

    Increasing Clouds

    • 52
    • 65

    Decreasing Clouds

    • 54
    • 62

    Rain Showers

    • 51
    • 58

    Rain Showers

    • 48
    • 59

    Chance Rain Showers

    • 50
    • 63

    Mostly Sunny

    • 51
    • 67

    Mostly Sunny

Today 18 Apr Carquinez Strait and Delta

Partly cloudy. Highs 73 to 79. Light Winds.

Tonight 18 Apr Carquinez Strait and Delta

Mostly cloudy. Lows around 51.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Carquinez Strait - Mare Island Temperature Statistics

April Temperature

Napa, Napa County Airport (9.3 miles)

  • Lowest 3 April, 2026

    38.6 °F

  • Average April

    57.9 °F

  • Highest 5 April, 2026

    83.6 °F

Climate (2021–Present)

Napa, Napa County Airport (9.3 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    70.2 °F
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