Summerland, CA Coastal Erosion Rate
What USGS measures 1 miles west of Summerland, CA
The coast 1 miles west of Summerland, CA shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What this reading actually covers
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Summerland, CA into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 34.42°N, 119.60°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 28 separate transects produced this segment's rate, with 39% individually reading as erosion, rather than relying on any single survey line. The published margin on this reading runs ±0.23 ft/yr. Taken at face value, this segment's raw 0.01 ft/yr reading would land it 787 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. Rank 1204 nationally for growth belongs to Long Beach, WA, 857 miles from this stretch, measured at 5.97 ft/yr. 2.6 miles up the coast, Montecito, CA shows the same lack of a significant trend.
Summerland, CA on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.