Harbor Beach Weather Forecast

    • 69
    • 75

    Rain Showers Likely

    • 69
    • 76

    Chance Rain Showers

    • 68
    • 73

    Slight Chance Thunderstorms

    • 67
    • 75

    Partly Sunny

    • 68
    • 75

    Mostly Cloudy

    • 68
    • 77

    Patchy Fog

Today 17 Sep San Diego County Coastal Areas

Mostly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs 75 to 80 near the coast to 79 to 83 inland. Areas of Winds northwest to 10 Mph becoming west with Gusts to 25 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 17 Sep San Diego County Coastal Areas

Mostly cloudy in the evening. Becoming partly cloudy. A chance of Showers and a slight chance of Thunderstorms. Lows around 70. Areas of Winds northwest 10 Mph in the evening becoming light. Chance of measurable precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harbor Beach Temperature Statistics

September Temperature

Oceanside, Oceanside Municipal Airport (2.5 miles)

  • Lowest 13 September, 2025

    57.9 °F

  • Average September

    69.9 °F

  • Highest 2 September, 2025

    82 °F

Climate (2020–Present)

Oceanside, Oceanside Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    52.7 °F

  • Average 2020–2025

    62.3 °F

  • Average High 2020–2025

    71.8 °F
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