Rotonda, FL Coastal Erosion Rate
Is the coast eroding 2.6 miles southwest of Rotonda, FL?
Nothing alarming measured 2.6 miles southwest of Rotonda, FL: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
What "Rotonda" means on this page
Rotonda, FL is the nearest named place, 2.6 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: 26.85, -82.30. The survey behind it runs to 2001, in USGS's Gulf of Mexico 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 backs this reading up
This reading comes from 129 individual transects averaged together, 51% of which measured erosion rather than growth. Uncertainty on this specific number: 1.56 ft/yr either side. The unadjusted figure here, -0.04 ft/yr, would place it 718 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS Open-File Report 2004-1089. Port Orford, OR sits at national rank 1028 for growth (0.53 ft/yr), one reference point among the 1211 scored segments, 2603 miles from here. 2.2 miles up the coast, Rotonda, FL shows the same lack of a significant trend.
Rotonda, FL on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.