US coastal water clarity this week: 2 regions clearing, 1 region declining, 3 regions steady. Notable: Florida Keys & South Atlantic clearing — read up 8.9 ft week-over-week.
Submarius's clarity model read Florida Keys & South Atlantic at 40.1 ft regional average; up 8.9 ft vs the prior week's read.
Submarius's clarity model read Florida Gulf Coast at 20.8 ft regional average; consistent with the prior week's read.
Submarius's clarity model read Southern California at 18.8 ft regional average; consistent with the prior week's read.
Submarius's clarity model read Hawaii at 47.1 ft regional average; down 5.6 ft vs the prior week's read.
Submarius's clarity model read Northeast Atlantic at 14.1 ft regional average; consistent with the prior week's read.
Submarius's clarity model read Mid-Atlantic & Gulf Coast at 31.7 ft regional average; up 1.5 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