Lake San Marcos Weather Forecast

    • 56
    • 75

    Increasing Clouds

    • 58
    • 73

    Mostly Cloudy

    • 60
    • 71

    Mostly Cloudy

    • 59
    • 69

    Chance Rain Showers

    • 57
    • 67

    Rain Showers Likely

    • 54
    • 66

    Rain Showers Likely

Today 27 Oct San Diego County Coastal Areas

Mostly sunny. Highs 73 to 77. Light Winds becoming west 10 Mph in the afternoon.

Tonight 27 Oct San Diego County Coastal Areas

Partly cloudy in the evening. Becoming mostly cloudy. Lows 55 to 59. Light Winds.

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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 14 October, 2026

    55.7 °F

  • Average October

    74.1 °F

  • Highest 3 October, 2026

    102.9 °F

Climate (2021–2026)

Carlsbad, McClellan-Palomar Airport (3.7 miles)

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  • Average Low 2021–2026

    57.3 °F

  • Average 2021–2026

    63.3 °F

  • Average High 2021–2026

    69.7 °F
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