Westhampton Beach, NY Coastal Erosion Rate
Shoreline change 0.7 miles south of Westhampton Beach, NY
Good news, and an honest one: USGS's data can't distinguish this stretch, 0.7 miles south of Westhampton Beach, NY, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What "Westhampton Beach" means on this page
USGS surveys the coast in transects spaced a few hundred feet apart; this page groups the nearest ones into a single ~3.5-mile reading for the stretch closest to Westhampton Beach, NY, rather than showing one arbitrary line. Segment center: 40.80, -72.65. Survey years: 2007-2009, method LRR, from USGS's New England / Mid-Atlantic shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
Where this fits nationally
This reading comes from 89 individual transects averaged together, 52% of which measured erosion rather than growth. The published margin on this reading runs ±0.47 ft/yr. The unadjusted figure here, -0.02 ft/yr, would place it 749 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS Open-File Report 2010-1119. Winchester Bay, OR sits at national rank 1117 for growth (1.07 ft/yr), one reference point among the 1211 scored segments, 2601 miles from here. 2.8 miles up the coast, Quogue, NY shows the same lack of a significant trend.
Westhampton Beach, NY on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.