Chesapeake Bay - Flag Harbor Weather Forecast

    • 52
    • 60

    Mostly Cloudy

    • 53
    • 60

    Mostly Cloudy

    • 56
    • 63

    Mostly Cloudy

    • 59
    • 66

    Partly Sunny

    • 63
    • 68

    Mostly Cloudy

    • 62
    • 69

    Rain Showers Likely

Today 31 Oct Calvert

Mostly sunny. Highs in the lower 60s. North Winds 5 to 10 Mph.

Tonight 31 Oct Calvert

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 40s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chesapeake Bay - Flag Harbor Temperature Statistics

October Temperature

St Marys County Airport (10.6 miles)

  • Lowest 19 October, 2026

    38.1 °F

  • Average October

    60.3 °F

  • Highest 14 October, 2026

    89.8 °F

Climate (2021–2026)

St Marys County Airport (10.6 miles)

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  • Average Low 2021–2026

    49.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    66.9 °F
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