Potomac River - McKays Beach Weather Forecast

    • 34
    • 40

    Mostly Sunny

    • 40
    • 51

    Partly Sunny

    • 50
    • 59

    Chance Rain Showers

    • 49
    • 64

    Partly Sunny

    • 48
    • 67

    Chance Rain Showers

    • 35
    • 58

    Partly Sunny

    • 37
    • 48

    Mostly Cloudy

Today 18 Mar St. Marys

Sunny. Highs in the lower 40s. Southeast Winds around 5 Mph.

Tonight 18 Mar St. Marys

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 30s. Southeast Winds around 5 Mph.

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Potomac River - McKays Beach Temperature Statistics

March Temperature

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

  • Lowest 2 March, 2026

    33.1 °F

  • Average March

    53.5 °F

  • Highest 11 March, 2026

    82 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    52 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    68.9 °F
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