Major Flood
9 ft
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
8 ft
Minor Flood
7 ft
What Floods at Each Level
16.73 ft
(Mean Lower Low Water (MLLW)) The level reached on October 29, 2012 during Post Tropical Cyclone Sandy.
10.83 ft
(MLLW) The level reached on November 25, 1950.
10.09 ft
(MLLW) The level reached on August 28, 2011 during Hurricane Irene.
9.94 ft
(MLLW) The level reached on March 13, 2010.
9.19 ft
(MLLW) The level reached on October 27, 2018.
9 ft
(MLLW) MAJOR FLOODING. At this level, flooding starts to become severe enough to begin causing structural damage along with widespread flooding of roadways in Aberdeen, Keyport, Union Beach, Keansburg and Middletown Township. Vulnerable homes and businesses may be severely damaged or destroyed as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone attempting to cross on foot or in a vehicle.
8 ft
(MLLW) MODERATE FLOODING. At this level, widespread flooding of roadways begins due to high water and/or wave action with many roads becoming impassable in Aberdeen, Keyport, Union Beach, Keansburg and Middletown Township. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.
7.8 ft
(MLLW) Flooding begins along sections of NJ Route 35 in Keyport and Hazlet as water backs up into tidal streams in the communities. Flooding begins along sections of NJ Route 36 in Keyport, Hazlet and Middletown Township as water backs up into tidal streams in the communities.
7.3 ft
(MLLW) COASTAL FLOOD ADVISORY LEVEL.
7.2 ft
(MLLW) Flooding begins in Aberdeen, Keyport (along West Front Street), Union Beach, Keansburg and Middletown Township.
7 ft
(MLLW) MINOR FLOODING.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Oct 28, 2012 | 16.73 ft | — |
| Nov 24, 1950 | 10.83 ft | — |
| Aug 27, 2011 | 10.09 ft | — |
About This Gauge
Get Flood Alerts for Raritan Bay
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 Raritan Bay at Keansburg (IN MLLW)?
The Raritan Bay at Keansburg (IN MLLW) gauge is maintained by USGS (site 01407081) 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 Raritan Bay at Keansburg (IN MLLW)?
The NWS-defined flood stage for Raritan Bay at Keansburg (IN MLLW) is 7 feet. Action stage begins at N/A feet. Moderate flooding starts at 8 feet, and major flooding at 9 feet.
How do I get alerts when Raritan Bay rises?
Download StormCast free on Google Play, go to River Gauges, and add Raritan Bay at Keansburg (IN MLLW) 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 Raritan Bay at Keansburg (IN MLLW) gauge located?
The gauge is located in Monmouth County, New Jersey at coordinates 40.4492°N, 74.1475°W. USGS site number: 01407081. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- <style type="text/css"> .style1 {background-color: #FFFF00;}</style>Please refer to our <style type="text/css"> .style1 { background-color: #FFFF00;} .style2 {background-color: #FFFF00;} </style> <a href="http://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=CFW&format=CI&version=1&glossary=0"> <span class="style1">Coastal Hazard Message</span></a> for specific information regarding Coastal Flood Watches, Warnings and Advisories. During tropical cyclones, please refer<a href="https://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=TCV&format=CI&version=1&glossary=1"> <span class="style2">here</span></a> for additional storm surge information.
- Flood impacts are based on long-term averages. Actual impacts from any tidal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow.