The dominant safety concern at Harmony Hall isn't weather — it's the surrounding area's crime rate. Prince George's County recorded a violent crime rate of 446.8 per 100,000 residents in 2023, which is roughly double the national average, and that context matters when you're planning an overnight stay at this Maryland site.
Keep valuables out of sight and lock your vehicle every time you step away, even briefly. Choose a campsite with good sightlines rather than an isolated spot, and consider a portable door alarm or motion-sensor light for your tent or RV entrance. On the weather side, the county logged 10 thunderstorm wind events, so stake your tent with heavy-duty anchors and pack gear away before storms roll in — but crime awareness is the more pressing preparation for this location.
Top recorded hazards in Prince George's County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Thunderstorm Wind 10
- Flood 1
Gear keyed to this park's risks
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About Harmony Hall
The 18th century Harmony Hall mansion is located on a 62.5-acre open pasture land estate along the Potomac River. This estate was purchased by the National Park Service in 1966, to preserve southern Maryland cultural heritage. Surrounded by a rich landscape, it offers visitors many chances to connect with Colonial History. The park also home to the remains of the Want Water House and canal.
Weather
Summers are generally hot and humid, with daytime highs frequently above 90 degrees Fahrenheit and scattered afternoon thunderstorms. Winters are generally cold, with nighttime lows frequently near freezing and occasional snowfall. Weather during spring and fall is generally moderate, but can change quickly..