Hanalei, HI Coastal Erosion Rate
Is the coast eroding 0.7 miles northwest of Hanalei, HI?
Nothing alarming measured 0.7 miles northwest of Hanalei, HI: 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.
The grain of this number
Hanalei, HI is the nearest named place, 0.7 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: 22.21, -159.51. Survey years: 2007-2010, method WLR, from USGS's Hawaii 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
Averaging 235 separate transects produced this segment's rate, with 43% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 0.35 ft/yr either side. The unadjusted figure here, 0.08 ft/yr, would place it 837 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 2011-1009. For scale: Oyehut, WA, 2603 miles away, ranks 1208 of 1211 nationally for growth, 7.54 ft/yr. 2.3 miles away, Princeville, HI is the nearest other measured stretch: also no significant trend.
Not this whole stretch, just Hanalei itself: the Coastal Change Hazards Portal is USGS's own live version of this data.