Potomac River - St Marys River Entrance Weather Forecast

    • 47
    • 62

    Increasing Clouds

    • 54
    • 65

    Mostly Sunny

    • 47
    • 71

    Rain Likely

    • 36
    • 57

    Chance Rain

    • 43
    • 53

    Partly Sunny

    • 42
    • 55

    Mostly Cloudy

Today 9 Mar St. Marys

Sunny. Highs in the upper 60s. Except in the lower 60s near the bay. Light and variable Winds, becoming south around 5 Mph this afternoon.

Tonight 9 Mar St. Marys

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 40s. South Winds around 5 Mph.

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Potomac River - St Marys River Entrance Temperature Statistics

March Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (1.9 miles)

  • Lowest 2 March, 2026

    33.1 °F

  • Average March

    45.3 °F

  • Highest 7 March, 2026

    68 °F

Climate (2021–Present)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (1.9 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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