Newport Beach, CA Coastal Erosion Rate
Is the coast eroding 3.1 miles south of Newport Beach, CA?
3.1 miles south of Newport Beach, CA: USGS's transects didn't pick up a trend here that beats the survey's own uncertainty. That's the majority case nationally, and for this stretch specifically it means the coast is holding, not that the data failed to find anything.
What "Newport Beach" 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 Newport Beach, CA. Centered near 33.58°N, 117.86°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.
Where this fits nationally
Averaging 53 separate transects produced this segment's rate, with 92% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 0.22 ft/yr either side. Taken at face value, this segment's raw -0.07 ft/yr reading would land it 693 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. For scale: El Segundo, CA, 40 miles away, ranks 1114 of 1211 nationally for growth, 1.04 ft/yr. Newport Beach, CA, 1.6 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Newport Beach: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.