US coastal water clarity this week: 4 region(s) clearing, 1 region(s) declining, 1 region(s) steady. Notable: Florida Gulf Coast clearing — read up 10.6 ft week-over-week.
Submarius's clarity model read Florida Keys & South Atlantic at 33.7 ft regional average; up 2.1 ft vs the prior week's read.
Submarius's clarity model read Florida Gulf Coast at 26.8 ft regional average; up 10.6 ft vs the prior week's read.
Submarius's clarity model read Southern California at 22.1 ft regional average; consistent with the prior week's read.
Submarius's clarity model read Hawaii at 51.5 ft regional average; down 1.2 ft vs the prior week's read.
Submarius's clarity model read Northeast Atlantic at 16.2 ft regional average; up 4.8 ft vs the prior week's read.
Submarius's clarity model read Mid-Atlantic & Gulf Coast at 18.0 ft regional average; up 8.2 ft vs the prior week's read.
Submarius estimates horizontal underwater visibility for any coastal point. It starts from that location's typical clarity for the time of year, built from in water measurements and satellite ocean color, then subtracts what changes day to day: wave stirring judged against depth and bottom type, river and runoff plumes, and tide driven water movement. Each estimate shows its data sources and how fresh they are. The underlying optics draw on Lee et al. 2015. See the methodology overview, the plain English conditions guide, and the glossary for the full picture.
Per-location and arbitrary-lat/lon clarity reads are available in the Submarius app. This weekly report publishes only regional aggregates so the model's recipe stays protected while the outcomes stay public.
Live verdict, water clarity bands, and a 2 day forecast at your spot — free, no signup. Pro adds the 8 day outlook.
Open Submarius