Sweetwater Marsh National Wildlife Refuge Weather Forecast

    • 67
    • 75

    Increasing Clouds

    • 67
    • 76

    Partly Sunny

    • 69
    • 75

    Partly Sunny

    • 71
    • 78

    Partly Sunny

    • 70
    • 81

    Partly Sunny

    • 69
    • 78

    Partly Sunny

Today 22 Sep San Diego County Coastal Areas

Partly cloudy this morning. Becoming mostly sunny. Highs 77 to 82. Areas of Winds northwest to 10 Mph becoming west with Gusts to 25 Mph this afternoon.

Tonight 22 Sep San Diego County Coastal Areas

Partly cloudy. Lows 61 to 66. Areas of Winds northwest to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sweetwater Marsh National Wildlife Refuge Temperature Statistics

September Temperature

Imperial Beach Naval Outlying Field - Ream Field (5 miles)

  • Lowest 3 September, 2026

    57.9 °F

  • Average September

    72.9 °F

  • Highest 9 September, 2026

    89.1 °F

Climate (2021–2026)

Imperial Beach Naval Outlying Field - Ream Field (5 miles)

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  • Average Low 2021–2026

    56.5 °F

  • Average 2021–2026

    63.2 °F

  • Average High 2021–2026

    69.5 °F
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