Potomac River - Belle Haven Marina Weather Forecast

    • 53
    • 85

    Rain Showers Likely

    • 34
    • 61

    Chance Rain

    • 37
    • 52

    Partly Sunny

    • 47
    • 63

    Slight Chance Rain

    • 51
    • 70

    Chance Rain

    • 34
    • 60

    Chance Rain

Today 22 Mar Arlington/Falls Church/Alexandria

Sunny. Highs in the mid 80s. South Winds around 15 Mph with Gusts up to 25 Mph.

Tonight 22 Mar Arlington/Falls Church/Alexandria

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the lower 50s. Southwest Winds 10 to 15 Mph, becoming north 5 to 10 Mph after midnight. Gusts up to 30 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Potomac River - Belle Haven Marina Temperature Statistics

March Temperature

Washington/Reagan National Airport, DC (5 miles)

  • Lowest 18 March, 2026

    27.6 °F

  • Average March

    50.9 °F

  • Highest 11 March, 2026

    86.6 °F

Climate (2021–Present)

Washington/Reagan National Airport, DC (5 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.3 °F

  • Average High 2021–2026

    69.1 °F
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