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Manasquan River at Allenwood

Highest listed crest 20.38 ftFlood stage 14.5 ft12 crests since 1998

The Manasquan River at Allenwood crested at major flood stage 1 time among the 12 crests the National Weather Service lists from 1998 to 2024. The highest, 20.38 ft on August 28, 2011, was major flooding, 5.88 feet above flood stage. 1 other gauge on the Manasquan River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
20.38 ft
August 28, 2011
Flood stage
14.5 ft
Major flooding from 18.0 ft
Crests at major
1
68th of 125 gauges in New Jersey
Most recent flood crest
January 10, 2024
15.24 ft, minor flooding
Location
Monmouth County
Near Point Pleasant (5.5 mi), Asbury Park (7.9 mi), Tinton Falls (8.4 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Manasquan River at Allenwood
Action stage13.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)14.511Jan 10, 2024Minimal or no property damage, but possibly some public threat
Moderate flood stage17.00—Some inundation of structures and roads near the stream
Major flood stage18.01Aug 28, 2011Extensive inundation of structures and roads

Every listed crest

12 crests from 1998 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Manasquan River at Allenwood, 1998 to 2024 1416182022ft Flood stage 14.5 ftMajor 18.0 ft Mar 9, 1998: 15.87 ft, minor floodingOct 14, 2005: 16.97 ft, minor floodingApr 16, 2007: 15.85 ft, minor floodingMar 14, 2010: 16.04 ft, minor floodingAug 28, 2011: 20.38 ft, major floodingDec 27, 2012: 16.43 ft, minor floodingMay 1, 2014: 16.57 ft, minor flooding; 3,457 cubic feet per secondMay 28, 2018: 16.56 ft, minor flooding; 3,446 cubic feet per secondAug 13, 2018: 15.61 ft, minor flooding; 2,556 cubic feet per secondNov 25, 2018: 16.22 ft, minor flooding; 3,060 cubic feet per secondDec 19, 2023: 15.70 ft, minor flooding; 2,615 cubic feet per secondJan 10, 2024: 15.24 ft, minor flooding; 2,316 cubic feet per second Highest, 20.38 ft, Aug 28, 2011 200020052010201520202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Manasquan River at Allenwood 1990s: 1 2000s: 2 2010s: 7 7 2020s: 2 1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.
  3. 5 crests measured on an earlier gauge datum are left out: 11.20 ft on Sep 27, 1975; 11.10 ft on Nov 8, 1977; 10.40 ft on Jan 21, 1979; 11.00 ft on Sep 18, 1980; 10.40 ft on Mar 29, 1984.

Highest crests

Highest listed crests, Manasquan River at Allenwood
1Aug 28, 201120.38+5.88Major—
2Oct 14, 200516.97+2.47Minor—
3May 1, 201416.57+2.07Minor3,457
4May 28, 201816.56+2.06Minor3,446
5Dec 27, 201216.43+1.93Minor—
6Nov 25, 201816.22+1.72Minor3,060
7Mar 14, 201016.04+1.54Minor—
8Mar 9, 199815.87+1.37Minor—
9Apr 16, 200715.85+1.35Minor—
10Dec 19, 202315.70+1.20Minor2,615
11Aug 13, 201815.61+1.11Minor2,556
12Jan 10, 202415.24+0.74Minor2,316

The worst floods along the Manasquan River

For this gauge's highest crests, the other gauges on the Manasquan River that crested above flood stage within a week.

August 28, 2011: 20.38 ft here, major flooding

  • SquankumNJ · Aug 28, 2011 · 13.06 ft · Major · its highest

October 14, 2005: 16.97 ft here, minor flooding

  • SquankumNJ · Oct 14, 2005 · 9.58 ft · Minor

May 28, 2018: 16.56 ft here, minor flooding

  • SquankumNJ · May 28, 2018 · 9.62 ft · Minor

Gauges on the Manasquan River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Manasquan River
SquankumNJ8.513.06 ft, Aug 28, 20112
Allenwood this gaugeNJ14.520.38 ft, Aug 28, 20111

Other gauges in Monmouth County

Flood gauges in Monmouth County
Squankum8.513.06 ft, Aug 28, 20112
New Jersey Atlantic Coast at Sandy Hook (IN MLLW)6.714.40 ft, Oct 29, 201214
Raritan Bay at Keansburg (IN MLLW)7.016.73 ft, Oct 29, 20126
Belmar (IN MLLW)5.913.22 ft, Oct 29, 20125
Neptune City7.07.94 ft, Dec 26, 19690
Sea Bright (IN MLLW)5.211.73 ft, Oct 29, 201210
Red Bank7.07.73 ft, May 1, 20140
Manasquan (IN MLLW)5.712.28 ft, Oct 29, 20124

Monmouth County: every hazard · River floods across the country · New Jersey

NOAA National Water Prediction Service, gauge ALLN4, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.