San Joaquin Reservoir Weather Forecast

    • 58
    • 72

    Mostly Cloudy

    • 57
    • 69

    Chance Rain Showers

    • 56
    • 67

    Rain Showers Likely

    • 52
    • 64

    Chance Rain Showers

    • 52
    • 65

    Mostly Sunny

    • 53
    • 67

    Mostly Sunny

    • 55
    • 69

    Partly Sunny

Today 9 Apr Orange County Coastal

Patchy fog this morning. Partly cloudy. Highs 70 to 73 at the Beaches to 74 to 78 farther inland and near higher coastal Terrain. Areas of Winds southeast 10 Mph becoming southwest with Gusts to 25 Mph this afternoon.

Tonight 9 Apr Orange County Coastal

Partly cloudy this evening. Becoming mostly cloudy. Lows 55 to 58. Areas of Winds west 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin Reservoir Temperature Statistics

April Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 4 April, 2026

    55.7 °F

  • Average April

    68.5 °F

  • Highest 4 April, 2026

    86.6 °F

Climate (2021–Present)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66 °F

  • Average High 2021–2026

    73.7 °F
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