Coronado, CA Coastal Erosion Rate
What USGS measures 7.1 miles northwest of Coronado, CA
The coast 7.1 miles northwest of Coronado, CA has been retreating at a measured 0.24 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 2.4 feet over the last decade.
What "Coronado" means on this page
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 Coronado, CA. Centered near 32.72°N, 117.26°W. Survey years: 1852-2016, method LRR, from USGS's California 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.
25 years at this rate
If 0.24 ft/yr holds for the next 25 years, the coast 7.1 miles northwest of Coronado, CA would retreat roughly 6 more feet, a projection, not a certainty: erosion rates shift with storms, sediment supply and any armoring built in the meantime.
How solid is this number
This reading comes from 3 individual transects averaged together, 100% of which measured erosion rather than growth. The published margin on this reading runs ±0.1 ft/yr. Sorted from fastest erosion to fastest growth across all 1211 measured segments nationally, this one lands at 460. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Corpus Christi, TX sits at national rank 169 for erosion (1.38 ft/yr), one reference point among the 1211 scored segments, 1245 miles from here. 3.1 miles away, San Diego, CA is the nearest other measured stretch: also no significant trend.
Not this whole stretch, just Coronado itself: the Coastal Change Hazards Portal is USGS's own live version of this data.