Harbor Island Weather Forecast

    • 69
    • 79

    Mostly Cloudy

    • 68
    • 77

    Mostly Cloudy

    • 67
    • 75

    Mostly Cloudy

    • 67
    • 76

    Mostly Cloudy

    • 67
    • 76

    Mostly Cloudy

    • 67
    • 77

    Partly Sunny

    • 67
    • 77

    Partly Sunny

Today 11 Aug San Diego County Coastal Areas

Partly cloudy this morning. Becoming mostly sunny. Highs 76 to 80 near the coast to 81 to 85 inland. Light Winds becoming west 10 Mph this afternoon.

Tonight 11 Aug San Diego County Coastal Areas

Partly cloudy this evening. Becoming mostly cloudy. Patchy dense fog. Lows 63 to 69. Areas of Winds west 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

August Temperature

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

  • Lowest 5 August, 2026

    68.6 °F

  • Average August

    75.3 °F

  • Highest 1 August, 2026

    81.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    58.1 °F

  • Average 2021–2026

    64.1 °F

  • Average High 2021–2026

    71.1 °F
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