Punaluu, HI Coastal Erosion Rate
Shoreline change 1.2 miles southeast of Punaluu, HI
Nothing alarming measured 1.2 miles southeast of Punaluu, 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
Punaluu, HI is the nearest named place, 1.2 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: 21.57, -157.88. The survey behind it runs to 2007-2010, in USGS's Hawaii assessment, using the WLR 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.
Where this fits nationally
95 transects feed this segment's number; 73% of them individually measured retreat. The published margin on this reading runs ±0.26 ft/yr. The unadjusted figure here, -0.11 ft/yr, would place it 636 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. North Redington Beach, FL sits at national rank 1084 for growth (0.84 ft/yr), one reference point among the 1211 scored segments, 4660 miles from here. Kaaawa, HI, 2.4 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Punaluu: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.