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The Water Around Us

Can you swim here today?

Lake Needwood, Rock Creek Regional Park

Derwood, Maryland · Park

Live flow only — judge the water in person

Use caution

As of October 20, 2026, USGS gauge 01647850, 4.1 miles away, reports a gage height of 4.28 ft near Lake Needwood, Rock Creek Regional Park but no water-temperature reading.

Live flow only — judge the water in person: live streamflow is available but no water-temperature sensor is nearby.

  • Live streamflow is available but no water-temperature sensor is nearby. — USGS gauge 01647850, as of Oct 20, 4:00 AM gauge-local time
Gage height
4.28 ft
water level

No official beach-advisory feed for Maryland yet — follow posted signs and local guidance.

Live, provisional data from USGS gauge TURKEY BRANCH NEAR ROCKVILLE, MD (4.1 mi away), as of Oct 20, 4:00 AM gauge-local time.

Live map near here →

Before you get in

  • Never swim alone — and keep weaker swimmers within arm's reach.
  • Scout depth and entry/exit points before you get in.
  • Read the current: avoid fast, rising, or murky water.
  • Check the forecast — get out well before storms or lightning.
  • Obey posted signs, flags, and lifeguard guidance.
See full details, photos & weather →

Read next

SafetyWater Safety 101: Rip Currents, Cold Water, and Drowning PreventionGuidesHow to Find Safe Swimming Holes: A Complete GuideGuidesBeating the Heat: Finding the Best Water Activities Near You

Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.