Lake San Marcos Weather Forecast

    • 57
    • 69

    Rain Showers Likely

    • 52
    • 65

    Rain Showers

    • 51
    • 66

    Mostly Sunny

    • 54
    • 70

    Mostly Sunny

    • 56
    • 74

    Patchy Fog

    • 57
    • 76

    Patchy Fog

Today 13 Oct San Diego County Coastal Areas

Mostly cloudy this morning. Becoming partly cloudy. Highs around 70. Areas of Winds southeast 10 to 15 Mph becoming southwest this afternoon. Gusts to 30 Mph.

Tonight 13 Oct San Diego County Coastal Areas

Mostly cloudy. A chance of Showers overnight. Lows 56 to 59. Areas of Winds south 10 to 15 Mph with Gusts to 25 Mph. Chance of measurable precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake San Marcos Temperature Statistics

October Temperature

Carlsbad, McClellan-Palomar Airport (3.7 miles)

  • Lowest 4 October, 2025

    59 °F

  • Average October

    65.9 °F

  • Highest 1 October, 2025

    73 °F

Climate (2020–Present)

Carlsbad, McClellan-Palomar Airport (3.7 miles)

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  • Average Low 2020–2025

    56.5 °F

  • Average 2020–2025

    62.4 °F

  • Average High 2020–2025

    68.8 °F
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