Carquinez Strait - Port Costa Weather Forecast

    • 44
    • 58

    Rain Showers

    • 47
    • 63

    Mostly Sunny

    • 46
    • 64

    Mostly Sunny

    • 47
    • 66

    Partly Sunny

    • 47
    • 67

    Sunny

    • 46
    • 73

    Mostly Sunny

Today 12 Apr East Bay Interior Valleys

Showers likely and a chance of Thunderstorms. Highs around 60. Southwest Winds 10 to 20 Mph.

Tonight 12 Apr East Bay Interior Valleys

Mostly cloudy in the evening then becoming mostly clear. A chance of Showers in the evening. Areas of fog after midnight. Lows in the mid 40s. Southwest Winds 5 to 15 Mph decreasing to up to 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Carquinez Strait - Port Costa Temperature Statistics

April Temperature

Concord, Buchanan Field (8.1 miles)

  • Lowest 3 April, 2026

    40.6 °F

  • Average April

    62.5 °F

  • Highest 5 April, 2026

    84.7 °F

Climate (2021–Present)

Concord, Buchanan Field (8.1 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    61.5 °F

  • Average High 2021–2026

    74.4 °F
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