Potomac River - Port Sunlight Beach Weather Forecast

    • 68
    • 82

    Mostly Sunny

    • 67
    • 81

    Mostly Sunny

    • 68
    • 83

    Mostly Sunny

    • 75
    • 86

    Mostly Sunny

    • 70
    • 88

    Chance Rain Showers

    • 68
    • 82

    Mostly Sunny

Today 6 Sep St. Marys

Sunny. Highs in the lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 6 Sep St. Marys

Mostly clear. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Potomac River - Port Sunlight Beach Temperature Statistics

September Temperature

St Marys County Airport (11.8 miles)

  • Lowest 2 September, 2026

    71.1 °F

  • Average September

    79.9 °F

  • Highest 1 September, 2026

    93.9 °F

Climate (2021–2026)

St Marys County Airport (11.8 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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