Barnegat Bay at Waretown (IN MLLW)
New Jersey — Water Level & Flood Stage
Located in Ocean County, New Jersey on the Barnegat Bay. Live water level data from USGS gauge 01409124, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
4.1 ft
Moderate Flood
3.1 ft
Minor Flood
2.1 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
4.1 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 Lacey Township, Ocean Township, Barnegat Township, and nearby communities. Vulnerable homes and businesses may be severely damaged 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 who attempts to cross on foot or in a vehicle.
3.1 ft
(MLLW) MODERATE FLOODING. At this level, widespread flooding of roadways begins with many roads becoming impassable in Lacey Township, Ocean Township, Barnegat Township, and nearby communities. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur.
2.5 ft
(MLLW) Flooding begins in Lacey Township and Ocean Township. Flooding begins along local roads in Barnegat Township, including Bay Shore Drive and East Bay Avenue.
2.4 ft
(MLLW) COASTAL FLOOD ADVISORY LEVEL.
2.1 ft
(MLLW) MINOR FLOODING.
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 |
|---|---|---|
| Oct 12, 2025 | 4.03 ft | — |
| Oct 12, 2025 | 4.03 ft | — |
| Dec 15, 2022 | 3.75 ft | — |
| Dec 15, 2022 | 3.75 ft | — |
| Oct 28, 2021 | 3.73 ft | — |
About This Gauge
Get Flood Alerts for Barnegat 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 Barnegat Bay at Waretown (IN MLLW)?
The Barnegat Bay at Waretown (IN MLLW) gauge is maintained by USGS (site 01409124) 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 Barnegat Bay at Waretown (IN MLLW)?
The NWS-defined flood stage for Barnegat Bay at Waretown (IN MLLW) is 2.1 feet. Action stage begins at N/A feet. Moderate flooding starts at 3.1 feet, and major flooding at 4.1 feet.
How do I get alerts when Barnegat Bay rises?
Download StormCast free on Google Play, go to River Gauges, and add Barnegat Bay at Waretown (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 — even when your screen is off.
Where is the Barnegat Bay at Waretown (IN MLLW) gauge located?
The gauge is located in Ocean County, New Jersey at coordinates 39.7700°N, 74.1883°W. USGS site number: 01409124. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Barnegat Bay
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Gauge reading affected by nearby construction.
- Please see <a href="http://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=CFW&format=CI&version=1&glossary=0"> PHICFWPHI</a> for storm-related departures.