Sand Canyon Reservoir Weather Forecast

    • 65
    • 83

    Increasing Clouds

    • 66
    • 84

    Partly Sunny

    • 66
    • 85

    Partly Sunny

    • 67
    • 87

    Mostly Sunny

    • 67
    • 87

    Mostly Sunny

    • 67
    • 87

    Mostly Sunny

Today 16 Aug Orange County Coastal

Partly cloudy this morning. Becoming mostly sunny. Highs 75 to 78 at the Beaches to 80 to 84 farther inland and near higher coastal Terrain. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 16 Aug Orange County Coastal

Mostly clear in the evening. Becoming partly cloudy. Lows 64 to 68. Areas of Winds west 10 to 15 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sand Canyon Reservoir Temperature Statistics

August Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 5 August, 2026

    68.6 °F

  • Average August

    76.5 °F

  • Highest 9 August, 2026

    89.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    73.7 °F
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