Carquinez Strait - Mare Island Weather Forecast

    • 52
    • 64

    Mostly Sunny

    • 56
    • 68

    Mostly Sunny

    • 54
    • 70

    Mostly Sunny

    • 54
    • 68

    Partly Sunny

    • 54
    • 64

    Partly Sunny

    • 54
    • 67

    Mostly Sunny

Today 20 Jun Carquinez Strait and Delta

Sunny. Highs 73 to 79. West Winds 10 to 20 Mph. Gusts up to 25 Mph increasing to 35 Mph in the afternoon.

Tonight 20 Jun Carquinez Strait and Delta

Clear, breezy. Lows 49 to 55. West Winds 15 to 25 Mph decreasing to 10 to 15 Mph after midnight. Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Carquinez Strait - Mare Island Temperature Statistics

June Temperature

Napa, Napa County Airport (9.3 miles)

  • Lowest 12 June, 2025

    44.1 °F

  • Average June

    61.9 °F

  • Highest 17 June, 2025

    78.1 °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

    70.6 °F
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