Major Flood
10.6 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
9.3 ft
Minor Flood
8.7 ft
What Floods at Each Level
11.6 ft
Longshore Drive from LI sound becomes impassable with several feet of water. Two to three feet of inundation into roadway properties surrounding corner of Water Street and River Street along the West River.One to two feet of inundation across Long Wharf Drive and surrounding properties including IKEA shopping center.
9.6 ft
Homes surrounded by water in East Haven. Water up to car windows on Cosey Beach Avenue. Several neighborhood roads in Silver Sands Beach 2 to 4 feet of inundation. New Haven, 2 to 3 feet of flooding on Middletown avenue in front of Petrillos used auto parts, just east of Quinnipiac River.
9.2 ft
Two to three feet of flooding on Middletown Avenue in front of Petrillos used auto parts, just east of the Quinnipiac River.
8.6 ft
East Haven, about 1 foot of inundation on Ellis Road. Minor inundation at Bruce and Johnson's West. Inundation onto Route 146 and Limewood Avenue. Minor inundation of Westland Avenue and Bayview Beach. Minor inundation of Middle Avenue.
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 |
|---|---|---|
| Sep 20, 1938 | 10.58 ft | — |
| Aug 30, 1954 | 9.58 ft | — |
| Oct 28, 2012 | 8.04 ft | — |
About This Gauge
USGS Site
NWS LID
NWHC3
River
Long Island Sound
County
New Haven, CT
Coordinates
41.2833°N, 72.9083°W
Get Flood Alerts for Long Island Sound
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 Long Island Sound at New Haven (IN MLLW)?
The Long Island Sound at New Haven (IN MLLW) gauge is maintained by USGS (site 8465705) 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 Long Island Sound at New Haven (IN MLLW)?
The NWS-defined flood stage for Long Island Sound at New Haven (IN MLLW) is 8.7 feet. Action stage begins at N/A feet. Moderate flooding starts at 9.3 feet, and major flooding at 10.6 feet.
How do I get alerts when Long Island Sound rises?
Download StormCast free on Google Play, go to River Gauges, and add Long Island Sound at New Haven (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 Long Island Sound at New Haven (IN MLLW) gauge located?
The gauge is located in New Haven County, Connecticut at coordinates 41.2833°N, 72.9083°W. USGS site number: 8465705. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Long Island Sound
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey