Potomac River - Port Sunlight Beach Weather Forecast

    • 60
    • 73

    Mostly Sunny

    • 58
    • 77

    Partly Sunny

    • 56
    • 72

    Mostly Sunny

    • 57
    • 72

    Partly Sunny

    • 62
    • 77

    Mostly Sunny

    • 68
    • 83

    Partly Sunny

Today 31 May St. Marys

Patchy fog in the morning. Sunny. Highs in the mid 70s. West Winds around 5 Mph.

Tonight 31 May St. Marys

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 50s. South Winds 5 to 10 Mph.

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Potomac River - Port Sunlight Beach Temperature Statistics

May Temperature

St Marys County Airport (11.8 miles)

  • Lowest 1 May, 2026

    39.9 °F

  • Average May

    64.6 °F

  • Highest 19 May, 2026

    95.2 °F

Climate (2021–Present)

St Marys County Airport (11.8 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    66.7 °F
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