Big Canyon Reservoir Weather Forecast

    • 57
    • 69

    Patchy Fog

    • 57
    • 67

    Mostly Cloudy

    • 55
    • 67

    Partly Sunny

    • 56
    • 67

    Mostly Sunny

    • 57
    • 69

    Mostly Sunny

    • 58
    • 71

    Mostly Sunny

Today 11 May Orange County Coastal

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs around 70 at the Beaches to 71 to 76 farther inland and near higher coastal Terrain. Areas of Winds west to 10 Mph.

Tonight 11 May Orange County Coastal

Partly cloudy in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 55 to 58. Areas of Winds west 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Canyon Reservoir Temperature Statistics

May Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 6 May, 2026

    56.6 °F

  • Average May

    65 °F

  • Highest 1 May, 2026

    72.6 °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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