Mission Bay - Fiesta Island Park Weather Forecast

    • 68
    • 72

    Increasing Clouds

    • 67
    • 71

    Mostly Cloudy

    • 67
    • 73

    Partly Sunny

    • 67
    • 76

    Partly Sunny

    • 69
    • 78

    Partly Sunny

    • 69
    • 80

    Partly Sunny

Today 20 Sep San Diego County Coastal Areas

Mostly cloudy in the morning. Becoming partly cloudy. Highs 73 to 78. Light Winds becoming west 10 Mph in the afternoon.

Tonight 20 Sep San Diego County Coastal Areas

Partly cloudy in the evening. Becoming cloudy. Lows 61 to 66. Light Winds.

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Mission Bay - Fiesta Island Park Temperature Statistics

September Temperature

San Diego, San Diego International-Lindbergh Field (3.7 miles)

  • Lowest 3 September, 2026

    63.6 °F

  • Average September

    76.7 °F

  • Highest 6 September, 2026

    95.6 °F

Climate (2021–2026)

San Diego, San Diego International-Lindbergh Field (3.7 miles)

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  • Average Low 2021–2026

    58.1 °F

  • Average 2021–2026

    64.2 °F

  • Average High 2021–2026

    71.1 °F
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