O'Neill Lake Weather Forecast

    • 44
    • 56

    Rain

    • 45
    • 55

    Chance Rain

    • 44
    • 64

    Partly Sunny

    • 50
    • 70

    Mostly Cloudy

    • 45
    • 67

    Chance Rain

    • 46
    • 66

    Slight Chance Rain

Today 13 Mar San Diego County Inland Valleys

Rain this Morning, then Showers and a slight chance of Thunderstorms this afternoon. Rain may be heavy at Times this morning. Highs around 55 in the western Valleys to 48 to 52 near the Foothills. Areas of Winds west 15 to 25 Mph. Gusts to 35 Mph. Becoming 40 Mph this afternoon.

Tonight 13 Mar San Diego County Inland Valleys

Mostly cloudy. A chance of Showers. Colder. Lows 33 to 43. Areas of Winds west 15 to 25 Mph with Gusts to 40 Mph becoming 10 to 15 Mph with Gusts to 30 Mph overnight. Chance of measurable precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

O'Neill Lake Temperature Statistics

March Temperature

Oceanside, Camp Pendleton, Marine Corps Air Station (2.5 miles)

  • Lowest 8 March, 2025

    39.9 °F

  • Average March

    56.4 °F

  • Highest 9 March, 2025

    75.9 °F

Climate (2020–Present)

Oceanside, Camp Pendleton, Marine Corps Air Station (2.5 miles)

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  • Average Low 2020–2025

    54.1 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    74.2 °F
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