Potomac River - McKays Beach Weather Forecast

    • 73
    • 85

    Partly Cloudy

    • 69
    • 83

    Partly Sunny

    • 69
    • 80

    Partly Sunny

    • 70
    • 84

    Chance Rain Showers

    • 69
    • 80

    Chance Rain Showers

    • 67
    • 78

    Chance Rain Showers

Today 17 Sep St. Marys

Mostly sunny. Highs in the mid 80s. South Winds 5 to 10 Mph.

Tonight 17 Sep St. Marys

Partly cloudy. Lows in the lower 70s. South Winds 5 to 10 Mph, becoming southwest after midnight.

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Potomac River - McKays Beach Temperature Statistics

September Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (7.5 miles)

  • Lowest 7 September, 2026

    64.9 °F

  • Average September

    77.3 °F

  • Highest 1 September, 2026

    91.9 °F

Climate (2021–2026)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (7.5 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    60.3 °F

  • Average High 2021–2026

    68.6 °F
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