Potomac River - Old Breton Beach Weather Forecast

    • 51
    • 80

    Rain Showers

    • 42
    • 55

    Rain Showers Likely

    • 51
    • 56

    Mostly Sunny

    • 54
    • 61

    Partly Sunny

    • 56
    • 66

    Mostly Sunny

    • 56
    • 66

    Partly Sunny

Today 16 Oct St. Marys

Partly sunny. Highs in the mid 80s. Southwest Winds 10 to 15 Mph.

Tonight 16 Oct St. Marys

Showers with a slight chance of Thunderstorms in the Evening, then Showers likely after midnight. Lows around 50. West Winds 10 to 15 Mph, becoming northwest after midnight. Chance of rain near 100 percent.

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Potomac River - Old Breton Beach Temperature Statistics

October Temperature

St Marys County Airport (8.7 miles)

  • Lowest 7 October, 2026

    44.2 °F

  • Average October

    65.4 °F

  • Highest 14 October, 2026

    89.8 °F

Climate (2021–2026)

St Marys County Airport (8.7 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    67 °F
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