Bellport, NY Coastal Erosion Rate
Shoreline change 2.8 miles southeast of Bellport, NY
The coast 2.8 miles southeast of Bellport, NY has been retreating at a measured 0.56 feet a year, USGS's own long-term rate for this stretch, built from historical shoreline positions rather than a single survey. At that rate, the shoreline has lost roughly 5.6 feet over the last decade.
What this reading actually covers
This is a roughly 3.5-mile stretch of coast, not one address or parcel - USGS's own transects run every few hundred feet, but that's finer than any one property needs, so this page reports the stretch nearest Bellport, NY. Centered near 40.72°N, 72.91°W. The survey behind it runs to 2007-2009, in USGS's New England / Mid-Atlantic assessment, using the LRR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
25 years at this rate
If 0.56 ft/yr holds for the next 25 years, the coast 2.8 miles southeast of Bellport, NY would retreat roughly 14 more feet, a projection, not a certainty: erosion rates shift with storms, sediment supply and any armoring built in the meantime.
What backs this reading up
Averaging 61 separate transects produced this segment's rate, with 100% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.21 ft/yr. This segment ranks 281 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2010-1119. For scale: Scituate, MA, 153 miles away, ranks 538 of 1211 nationally for erosion, 0.17 ft/yr, 0.3x this stretch's rate. 1.4 miles up the coast, Bellport, NY shows 0.56 ft/yr of eroding.
One address near Bellport: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.