Chesapeake Bay - Flag Harbor Weather Forecast

    • 46
    • 54

    Mostly Sunny

    • 58
    • 64

    Chance Rain Showers

    • 60
    • 74

    Mostly Cloudy

    • 61
    • 70

    Chance Rain Showers

    • 47
    • 73

    Rain Showers Likely

    • 43
    • 55

    Partly Sunny

    • 51
    • 57

    Chance Rain Showers

Today 27 Mar Calvert

Sunny. Highs in the upper 50s. West Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 27 Mar Calvert

Mostly clear. Lows around 40. South Winds 5 to 10 Mph.

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  • Temperature Real-Time

Chesapeake Bay - Flag Harbor Temperature Statistics

March Temperature

St Marys County Airport (10.6 miles)

  • Lowest 3 March, 2025

    21.2 °F

  • Average March

    47.8 °F

  • Highest 20 March, 2025

    73.4 °F

Climate (2020–Present)

St Marys County Airport (10.6 miles)

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  • Average Low 2020–2025

    49.4 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    66.5 °F
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