Chesapeake Bay - Potomac River Entrance Weather Forecast

    • 65
    • 67

    Rain Showers

    • 66
    • 69

    Rain Showers

    • 59
    • 71

    Partly Sunny

    • 58
    • 62

    Mostly Sunny

    • 59
    • 64

    Mostly Sunny

    • 61
    • 69

    Mostly Sunny

Today 3 Oct St. Marys

Showers likely late this Morning, then Showers this afternoon. Cooler with Highs in the mid 60s. North Winds 5 to 10 Mph. Chance of rain 80 percent.

Tonight 3 Oct St. Marys

Showers Likely, mainly in the evening. Lows around 60. Northeast Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chesapeake Bay - Potomac River Entrance Temperature Statistics

October Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (9.3 miles)

  • Lowest 1 October, 2026

    62.1 °F

  • Average October

    72.6 °F

  • Highest 1 October, 2026

    87.1 °F

Climate (2021–2026)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (9.3 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    60.3 °F

  • Average High 2021–2026

    68.6 °F
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