Coronado, CA Coastal Erosion Rate
Shoreline change 0.5 miles southeast of Coronado, CA
0.5 miles southeast of Coronado, CA, the coast is advancing, not retreating, at a measured 1.22 feet a year, sediment accumulating faster than any erosion USGS recorded here. At that rate, the shoreline has gained roughly 12.2 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 Coronado, CA, rather than showing one arbitrary line. Segment center: 32.65, -117.15. The survey behind it runs to 1852-2016, in USGS's California 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.
What 1.22 ft/yr means over time
Holding the 1.22 ft/yr accretion rate 0.5 miles southeast of Coronado, CA for 25 years would add roughly 31 feet of shoreline, again assuming nothing about the local sediment supply changes.
Where this fits nationally
126 transects feed this segment's number; 0% of them individually measured retreat. USGS's confidence interval here is ±0.58 ft/yr. Among the 1211 US coastal segments with a measurable trend, this one ranks 1125 for erosion, 1 being the fastest-retreating coast in the dataset. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Mexico Beach, FL sits at national rank 1046 for growth (0.6 ft/yr), one reference point among the 1211 scored segments, 1881 miles from here. Coronado, CA, 2.1 miles off, is the adjacent measured stretch, reading accretion (beach growing) at 1.69 ft/yr.
One address near Coronado: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.