Harbor Island Weather Forecast

    • 53
    • 64

    Rain Showers

    • 54
    • 65

    Mostly Cloudy

    • 52
    • 64

    Partly Sunny

    • 50
    • 65

    Mostly Sunny

    • 50
    • 67

    Partly Sunny

    • 51
    • 70

    Mostly Sunny

Today 5 Jan San Diego County Coastal Areas

Cloudy with a chance of Showers and a slight chance of Thunderstorms in the Morning, then partly cloudy with a slight chance of Showers in the afternoon. Highs around 63. Areas of Winds south to 10 Mph. Chance of measurable precipitation 50 percent.

Tonight 5 Jan San Diego County Coastal Areas

Mostly cloudy with a slight chance of Showers. Lows 49 to 53. Light Winds becoming east 10 Mph overnight. Chance of measurable precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

January Temperature

San Diego, San Diego International-Lindbergh Field (0.6 miles)

  • Lowest 1 January, 2026

    61 °F

  • Average January

    63.4 °F

  • Highest 2 January, 2026

    68 °F

Climate (2021–Present)

San Diego, San Diego International-Lindbergh Field (0.6 miles)

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  • Average Low 2021–2026

    57.9 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    70.7 °F
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