Delaware River at Trenton, NJ
River level and flood forecast · Mercer County
The river is 9.7 ft below flood stage (20 ft).
Forecast to fall to 9.7 ft by Thu, Oct 15, 2 PM.
Flow: 12,600 cubic feet per second (USGS).
River camera
Watch the time-lapse
Camera by the U.S. Geological Survey. Most take a picture every hour, some every few minutes; many stop at night.
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 3:01 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Delaware River at Trenton to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 25 ft |
| Moderate flood stage | 23 ft |
| Flood stage | 20 ft |
| Action stage | 17 ft |
| Record crest (March 8, 1904) | 30.6 ft |
What floods at each level
From the National Weather Service, highest first.
- 25 ftThe Delaware River meets the Delaware Canal, backfilling the Rivermawr and Flats neighborhoods making all roads east of the canal impassable.
- 24.5 ftCarr's Lane in Yardley begins to flood.
- 23 ftNorth and South Bell Avenues in Yardley begin to flood.
- 22 ftRoute 32 in Yardley is flooded in both directions. Up to two feet of water covers portions of Morgan Avenue, Brown Street, Maple Avenue, and Fuld Avenue.
- 21.5 ftFerry Street in Yardley begins to flood.
- 20 ftHouses on Brown Street in Yardley begin to take on water. Houses on Afton Avenue also take on water. Southbound lanes are closed along stretches of Route 29 in Trenton. Route 32 North is closed in Yardley borough. River Road (Route 32), north of Woodside Road and south of Mt. Eyre Road, in Lower Makefield Township, begins to flood.
- 19.5 ftMorgan Avenue in Yardley Borough begins to flood. River Road (PA Rt 32) at East Ferry Road in Lower Makefield Township begins to flood.
- 18.5 ftPA Route 32 South at East College Avenue in Yardley borough begins to flood. Water begins to enter Level 1 of the parking garage at the State Capital Building. Sections of Stacey Park in Trenton are closed.
- 18 ftPA Route 32 North is closed between Brown Street and Maple Avenue.
- 17 ftPA Route 32 North in Yardley Borough begins to flood between Brown Street and Maple Avenue.
Highest crests on record
- 30.6 ft — March 8, 1904
- 28.6000003814697 ft — August 20, 1955
- 28.5 ft — October 11, 1903
- 25.33 ft — April 4, 2005
- 25.09 ft — June 29, 2006
Recent crests: 20.76 ft (September 3, 2021) · 19.93 ft (January 15, 2018) · 16.46 ft (May 1, 2014) · 20.76 ft (January 9, 2014) · 22.16 ft (September 9, 2011)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (TREN4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.