Atlantic Beach, NY Coastal Erosion Rate
What USGS measures 1.1 miles west of Atlantic Beach, NY
Unusual good news for this stretch: the shoreline 1.1 miles west of Atlantic Beach, NY has grown by a measured 2.35 feet a year on average, per USGS's long-term transect data for this section. At that rate, the shoreline has gained roughly 23.5 feet over the last decade.
What this reading actually covers
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 Atlantic Beach, NY, rather than showing one arbitrary line. Segment center: 40.59, -73.74. 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.
What 2.35 ft/yr means over time
Holding the 2.35 ft/yr accretion rate 1.1 miles west of Atlantic Beach, NY for 25 years would add roughly 59 feet of shoreline, again assuming nothing about the local sediment supply changes.
Where this fits nationally
56 transects feed this segment's number; 11% of them individually measured retreat. The published margin on this reading runs ±1.13 ft/yr. This segment ranks 1170 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2010-1119. Rank 991 nationally for growth belongs to Shinnecock Hills, NY, 70 miles from this stretch, measured at 0.39 ft/yr, 0.2x this stretch's rate. 2.4 miles up the coast, East Atlantic Beach, NY shows 2.39 ft/yr of accreting.
Not this whole stretch, just Atlantic Beach itself: the Coastal Change Hazards Portal is USGS's own live version of this data.