Manasquan River at Allenwood, NJ
River level and flood forecast · Monmouth County
The river is 6.0 ft below flood stage (14.5 ft).
Flow: 188 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 Sun, Dec 31, 7 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 Manasquan River at Allenwood to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 18 ft |
| Moderate flood stage | 17 ft |
| Flood stage | 14.5 ft |
| Action stage | 13 ft |
| Record crest (August 28, 2011) | 20.38 ft |
What floods at each level
From the National Weather Service, highest first.
- 18 ftFlooding expands on Hospital and Lakewood-Allenwood Roads. The roads are closed.
- 17 ftHospital Road and Lakewood-Allenwood Road are subject to partial or full lane closures.
- 14.5 ftWalking and riding trails as well as as parking lots are flooded in Allaire State Park.
- 13 ftThe river overflows out of its banks and floods open land in Allaire State Park.
Highest crests on record
- 20.38 ft — August 28, 2011
- 16.97 ft — October 14, 2005
- 16.57 ft — May 1, 2014
- 16.56 ft — May 28, 2018
- 16.43 ft — December 27, 2012
Recent crests: 15.24 ft (January 10, 2024) · 15.7 ft (December 19, 2023) · 16.22 ft (November 25, 2018) · 15.61 ft (August 13, 2018) · 16.56 ft (May 28, 2018)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (ALLN4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.