Long Beach, CA Coastal Erosion Rate
Shoreline change 1.2 miles southwest of Long Beach, CA
1.2 miles southwest of Long Beach, CA, the coast is advancing, not retreating, at a measured 1.31 feet a year, sediment accumulating faster than any erosion USGS recorded here. At that rate, the shoreline has gained roughly 13.1 feet over the last decade.
What this reading actually covers
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 Long Beach, CA. Centered near 33.77°N, 118.18°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
Holding the 1.31 ft/yr accretion rate 1.2 miles southwest of Long Beach, CA for 25 years would add roughly 33 feet of shoreline, again assuming nothing about the local sediment supply changes.
What backs this reading up
14 transects feed this segment's number; 0% of them individually measured retreat. Uncertainty on this specific number: 0.45 ft/yr either side. Among the 1211 US coastal segments with a measurable trend, this one ranks 1135 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. Rank 1035 nationally for growth belongs to Port St. Joe, FL, 1936 miles from this stretch, measured at 0.56 ft/yr, 0.4x this stretch's rate. Long Beach, CA, 1.8 miles off, is the adjacent measured stretch, reading slight accretion (beach growing) at 0.89 ft/yr.
Not this whole stretch, just Long Beach itself: the Coastal Change Hazards Portal is USGS's own live version of this data.