Chesapeake Bay - Chesapeake Bay Basin Weather Forecast

    • 66
    • 76

    Chance Rain Showers

    • 66
    • 70

    Rain Showers

    • 67
    • 71

    Rain Showers Likely

    • 67
    • 74

    Partly Sunny

    • 67
    • 79

    Mostly Sunny

    • 65
    • 75

    Partly Sunny

Today 15 Sep St. Marys

Partly sunny. Highs in the upper 70s. Northeast Winds 10 to 15 Mph.

Tonight 15 Sep St. Marys

Partly cloudy. Lows in the lower 60s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Chesapeake Bay - Chesapeake Bay Basin Temperature Statistics

September Temperature

Patuxent River, Naval Air Station (1.2 miles)

  • Lowest 1 September, 2025

    55.9 °F

  • Average September

    69.7 °F

  • Highest 6 September, 2025

    91 °F

Climate (2020–Present)

Patuxent River, Naval Air Station (1.2 miles)

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  • Average Low 2020–2025

    53 °F

  • Average 2020–2025

    61.3 °F

  • Average High 2020–2025

    69.5 °F
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