Major Flood
11 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
10 ft
Minor Flood
8.5 ft
Action Stage
7 ft
What Floods at Each Level
11 ft
Flooding expands on Hospital and Lakewood-Allenwood Roads. The roads are closed.
10 ft
Hospital Road and Lakewood-Allenwood Road are subject to partial or full lane closures.
8.5 ft
Walking and riding trails as well as parking lots are flooded in Allaire State Park.
7 ft
The river overflows out of its banks and floods open land in Allaire State Park.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Aug 27, 2011 | 13.06 ft | — |
| Sep 20, 1938 | 12.45 ft | 2,940 cfs |
| Nov 7, 1977 | 10.37 ft | 2,040 cfs |
About This Gauge
USGS Site
NWS LID
SAMN4
River
Manasquan River
County
Monmouth, NJ
Coordinates
40.1614°N, 74.1547°W
Get Flood Alerts for Manasquan River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Manasquan River at Squankum?
The Manasquan River at Squankum gauge is maintained by USGS (site 01408000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Manasquan River at Squankum?
The NWS-defined flood stage for Manasquan River at Squankum is 8.5 feet. Action stage begins at 7 feet. Moderate flooding starts at 10 feet, and major flooding at 11 feet.
How do I get alerts when Manasquan River rises?
Download StormCast free on Google Play, go to River Gauges, and add Manasquan River at Squankum to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Manasquan River at Squankum gauge located?
The gauge is located in Monmouth County, New Jersey at coordinates 40.1614°N, 74.1547°W. USGS site number: 01408000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Manasquan River
On This River
Downstream: Manasquan River at Allenwood
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey