Port Hueneme, CA Coastal Erosion Rate
Shoreline change 4.8 miles southeast of Port Hueneme, CA
0.57 feet a year: that is the measured retreat rate USGS's transects show for the coast 4.8 miles southeast of Port Hueneme, CA, averaged across the full historical record surveyed here. At that rate, the shoreline has lost roughly 5.7 feet over the last decade.
The grain of this number
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Port Hueneme, CA into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 34.11°N, 119.15°W. The survey behind it runs to 1852-2016, in USGS's California 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.
25 years at this rate
If 0.57 ft/yr holds for the next 25 years, the coast 4.8 miles southeast of Port Hueneme, CA would retreat roughly 14 more feet, a projection, not a certainty: erosion rates shift with storms, sediment supply and any armoring built in the meantime.
Where this fits nationally
Averaging 97 separate transects produced this segment's rate, with 100% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.36 ft/yr. Among the 1211 US coastal segments with a measurable trend, this one ranks 277 for erosion, 1 being the fastest-retreating coast in the dataset. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Rank 93 nationally for erosion belongs to Grove City, FL, 2236 miles from this stretch, measured at 3.02 ft/yr, 5.3x this stretch's rate. 1.8 miles away, Port Hueneme, CA is the nearest other measured stretch: slight erosion at 0.44 ft/yr.
Not this whole stretch, just Port Hueneme itself: the Coastal Change Hazards Portal is USGS's own live version of this data.