Potomac River - Belle Haven Marina Weather Forecast

    • 63
    • 82

    Becoming Sunny

    • 66
    • 87

    Increasing Clouds

    • 69
    • 86

    Mostly Cloudy

    • 70
    • 83

    Chance Rain Showers

    • 68
    • 81

    Chance Rain Showers

    • 68
    • 82

    Slight Chance Rain Showers

    • 70
    • 83

    Slight Chance Thunderstorms

Today 3 Aug Arlington/Falls Church/Alexandria

Mostly sunny. Highs in the lower 80s. East Winds around 5 Mph.

Tonight 3 Aug Arlington/Falls Church/Alexandria

Partly cloudy this Evening, then clearing. Lows in the mid 60s. Southeast Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Belle Haven Marina Temperature Statistics

August Temperature

Washington/Reagan National Airport, DC (5 miles)

  • Lowest 1 August, 2025

    68 °F

  • Average August

    71.2 °F

  • Highest 1 August, 2025

    75.9 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (5 miles)

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  • Average Low 2020–2025

    52.7 °F

  • Average 2020–2025

    60.5 °F

  • Average High 2020–2025

    69.2 °F
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