Harbor Island Weather Forecast

    • 57
    • 70

    Chance Rain Showers

    • 55
    • 68

    Mostly Cloudy

    • 55
    • 70

    Partly Sunny

    • 57
    • 69

    Mostly Cloudy

    • 56
    • 67

    Mostly Cloudy

    • 55
    • 67

    Partly Sunny

    • 55
    • 69

    Partly Sunny

Today 21 Apr San Diego County Coastal Areas

Partly cloudy this morning. Becoming mostly sunny. Highs 69 to 73. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph this afternoon.

Tonight 21 Apr San Diego County Coastal Areas

Mostly cloudy. A chance of Showers. Lows 50 to 57. Areas of Winds northwest 10 to 15 Mph. Chance of measurable precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

April Temperature

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

  • Lowest 4 April, 2026

    52.6 °F

  • Average April

    65.4 °F

  • Highest 4 April, 2026

    81.6 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    58 °F

  • Average 2021–2026

    64 °F

  • Average High 2021–2026

    71 °F
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