Southampton, NY Coastal Erosion Rate
Shoreline change 0.6 miles south of Southampton, NY
Nothing alarming measured 0.6 miles south of Southampton, NY: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
What "Southampton" means on this page
Southampton, NY is the nearest named place, 0.6 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 40.87, -72.40. 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.
How solid is this number
75 transects feed this segment's number; 100% of them individually measured retreat. Uncertainty on this specific number: 0.27 ft/yr either side. The unadjusted figure here, -0.23 ft/yr, would place it 466 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. Rank 1089 nationally for growth belongs to Long Beach, CA, 2532 miles from this stretch, measured at 0.89 ft/yr. 1.4 miles up the coast, Southampton, NY shows the same lack of a significant trend.
Not this whole stretch, just Southampton itself: the Coastal Change Hazards Portal is USGS's own live version of this data.