Harbor Island Weather Forecast

    • 60
    • 73

    Increasing Clouds

    • 60
    • 75

    Partly Sunny

    • 59
    • 72

    Mostly Cloudy

    • 58
    • 70

    Partly Sunny

    • 58
    • 69

    Partly Sunny

    • 59
    • 69

    Partly Sunny

    • 60
    • 69

    Partly Sunny

Today 19 May San Diego County Coastal Areas

Partly cloudy this morning. Becoming mostly sunny. Highs 68 to 72 near the coast to 73 to 78 inland. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph this afternoon.

Tonight 19 May San Diego County Coastal Areas

Partly cloudy. Patchy fog overnight. Lows 56 to 59. Areas of Winds west 10 to 15 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Island Temperature Statistics

May Temperature

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

  • Lowest 5 May, 2026

    56.6 °F

  • Average May

    65.4 °F

  • Highest 13 May, 2026

    71.7 °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

    64.1 °F

  • Average High 2021–2026

    71 °F
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