Redondo Beach, CA Coastal Erosion Rate
Is the coast eroding 0.3 miles northeast of Redondo Beach, CA?
0.3 miles northeast of Redondo Beach, CA, the coast is advancing, not retreating, at a measured 0.53 feet a year, sediment accumulating faster than any erosion USGS recorded here. At that rate, the shoreline has gained roughly 5.3 feet over the last decade.
What "Redondo Beach" means on this page
Redondo Beach, CA is the nearest named place, 0.3 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: 33.85, -118.40. 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 0.53 ft/yr means over time
Holding the 0.53 ft/yr accretion rate 0.3 miles northeast of Redondo Beach, CA for 25 years would add roughly 13 feet of shoreline, again assuming nothing about the local sediment supply changes.
What backs this reading up
Averaging 80 separate transects produced this segment's rate, with 0% individually reading as erosion, rather than relying on any single survey line. The published margin on this reading runs ±0.33 ft/yr. This segment ranks 1030 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. For scale: Texas City, TX, 1422 miles away, ranks 1179 of 1211 nationally for growth, 2.85 ft/yr, 5.4x this stretch's rate. 2.9 miles up the coast, Manhattan Beach, CA shows 0.58 ft/yr of accreting.
Not this whole stretch, just Redondo Beach itself: the Coastal Change Hazards Portal is USGS's own live version of this data.