Potomac River - Old Breton Beach Weather Forecast

    • 72
    • 83

    Mostly Sunny

    • 59
    • 83

    Rain Showers Likely

    • 56
    • 64

    Rain Showers Likely

    • 58
    • 62

    Rain Showers Likely

    • 63
    • 69

    Rain Showers Likely

    • 63
    • 70

    Rain Showers Likely

Today 19 May St. Marys

Sunny, hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph.

Tonight 19 May St. Marys

Mostly clear. Lows in the lower 70s. South Winds 5 to 10 Mph.

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Potomac River - Old Breton Beach Temperature Statistics

May Temperature

St Marys County Airport (8.7 miles)

  • Lowest 1 May, 2026

    39.9 °F

  • Average May

    60.3 °F

  • Highest 16 May, 2026

    84 °F

Climate (2021–Present)

St Marys County Airport (8.7 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    66.7 °F
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