San Joaquin Reservoir Weather Forecast

    • 59
    • 70

    Increasing Clouds

    • 61
    • 70

    Partly Sunny

    • 63
    • 72

    Partly Sunny

    • 61
    • 72

    Partly Sunny

    • 62
    • 72

    Partly Sunny

    • 63
    • 73

    Partly Sunny

Today 7 Jun Orange County Coastal

Mostly cloudy this morning. Becoming mostly sunny. Highs around 70 at the Beaches to 71 to 74 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 7 Jun Orange County Coastal

Partly cloudy in the evening. Becoming mostly cloudy. Lows 57 to 61. Areas of Winds southwest 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin Reservoir Temperature Statistics

June Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 2 June, 2026

    62.7 °F

  • Average June

    67.8 °F

  • Highest 1 June, 2026

    73.7 °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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