Carquinez Strait - Port Costa Weather Forecast

    • 43
    • 60

    Becoming Sunny

    • 44
    • 61

    Partly Sunny

    • 46
    • 63

    Partly Sunny

    • 45
    • 63

    Partly Sunny

    • 43
    • 61

    Partly Sunny

    • 44
    • 60

    Mostly Sunny

Today 25 Nov East Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Areas of dense fog in the morning. Highs near 60. Northeast Winds around 5 Mph.

Tonight 25 Nov East Bay Interior Valleys

Partly cloudy. Patchy dense fog in the evening. Areas of dense fog after midnight. Lows in the lower 40s. Light Winds becoming northeast around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Carquinez Strait - Port Costa Temperature Statistics

November Temperature

Concord, Buchanan Field (8.1 miles)

  • Lowest 21 November, 2025

    43 °F

  • Average November

    58.5 °F

  • Highest 2 November, 2025

    79 °F

Climate (2020–Present)

Concord, Buchanan Field (8.1 miles)

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  • Average Low 2020–2025

    50.8 °F

  • Average 2020–2025

    61.3 °F

  • Average High 2020–2025

    74.4 °F
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