Navarre, FL Coastal Erosion Rate
What USGS measures 2.4 miles east of Navarre, FL
2.4 miles east of Navarre, FL: 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.
The grain of this number
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 Navarre, FL. Centered near 30.41°N, 86.85°W. Survey years: 2001, method LRR, from USGS's Gulf of Mexico 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.
What backs this reading up
95 transects feed this segment's number; 88% of them individually measured retreat. The published margin on this reading runs ±0.59 ft/yr. Taken at face value, this segment's raw -0.17 ft/yr reading would land it 536 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2004-1089. Rank 1112 nationally for growth belongs to Qui-nai-elt Village, WA, 2292 miles from this stretch, measured at 1.04 ft/yr. 3 miles away, Hurlburt Field, FL is the nearest other measured stretch: also no significant trend.
Navarre, FL on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.