Long Island Sound at Sands Point (IN MLLW)

Highest listed crest 16.75 ftFlood stage 10.0 ft10 crests since 1938

The Long Island Sound at Sands Point (IN MLLW) crested at major flood stage 10 times among the 10 crests the National Weather Service lists from 1938 to 2012. The highest, 16.75 ft on September 21, 1938, was major flooding, 6.75 feet above flood stage. 2 other gauges on the Long Island Sound crested above flood stage within a week of it, 2 at their own highest listed crest.

The gauge

Highest listed crest: 16.75 ft; September 21, 1938
Flood stage: 10.0 ft; Major flooding from 12.0 ft
Crests at major: 10; 9th of 160 gauges in New York
Most recent flood crest: October 29, 2012; 14.31 ft, major flooding
Location: Nassau County; Near Glen Cove (3.7 mi), Great Neck (4.6 mi), Mamaroneck (4.9 mi)
Identifiers: NWS SADN6; USGS 01302250

Flood stages

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

Flood categories, Long Island Sound at Sands Point (IN MLLW)

Action stage	9.5	0	—	The level at which the NWS or its partners begin to take action
Flood stage (minor)	10.0	0	—	Minimal or no property damage, but possibly some public threat
Moderate flood stage	11.0	0	—	Some inundation of structures and roads near the stream
Major flood stage	12.0	10	Oct 29, 2012	Extensive inundation of structures and roads

Every listed crest

10 crests from 1938 to 2012. Filled: at or above flood stage. Hover a crest for its date and stage.

Crests at or above flood stage, by decade

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.
Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Long Island Sound at Sands Point (IN MLLW)

1	Sep 21, 1938	16.75	+6.75	Major	—
2	Aug 31, 1954	14.76	+4.76	Major	—
3	Oct 29, 2012	14.31	+4.31	Major	—
4	Dec 11, 1992	14.29	+4.29	Major	—
5	Feb 7, 1978	13.60	+3.60	Major	—
6	Nov 25, 1950	13.05	+3.05	Major	—
7	Nov 12, 1968	12.95	+2.95	Major	—
8	Oct 19, 1996	12.70	+2.70	Major	—
9	Oct 25, 1980	12.68	+2.68	Major	—
10	Feb 19, 1972	12.41	+2.41	Major	—

The worst floods along the Long Island Sound

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

September 21, 1938: 16.75 ft here, major flooding

New London Harbor (IN MLLW)CT · Sep 21, 1938 · 10.58 ft · Major · its highest
New Haven (IN MLLW)CT · Sep 21, 1938 · 10.58 ft · Moderate · its highest

August 31, 1954: 14.76 ft here, major flooding

New London Harbor (IN MLLW)CT · Aug 31, 1954 · 9.58 ft · Major
New Haven (IN MLLW)CT · Aug 31, 1954 · 9.58 ft · Moderate

October 29, 2012: 14.31 ft here, major flooding

Bridgeport Harbor (IN MLLW)CT · Oct 29, 2012 · 13.26 ft · Major · its highest
New London Harbor (IN MLLW)CT · Oct 29, 2012 · 8.04 ft · Major

Gauges on the Long Island Sound

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Long Island Sound

New Haven (IN MLLW)	CT	8.7	10.58 ft, Sep 21, 1938	0
Sands Point (IN MLLW) this gauge	NY	10.0	16.75 ft, Sep 21, 1938	10
Bridgeport Harbor (IN MLLW)	CT	8.7	13.26 ft, Oct 29, 2012	3
New London Harbor (IN MLLW)	CT	5.0	10.58 ft, Sep 21, 1938	3

Other gauges in Nassau County

Flood gauges in Nassau County

Hudson Bay at Freeport (IN MLLW)	6.0	10.12 ft, Oct 29, 2012	2
Jamaica Bay at Inwood (IN MLLW)	7.8	11.65 ft, Oct 29, 2012	1
Little Neck Bay at Kings Point (IN MLLW)	10.0	16.75 ft, Sep 21, 1938	6

Nassau County: every hazard · River floods across the country · New York

NOAA National Water Prediction Service, gauge SADN6, 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.