US coastal water clarity this week: 5 region(s) clearing, 1 region(s) declining. Notable: Florida Keys & South Atlantic clearing — read up 16.6 ft week-over-week.
Regional reads
Florida Keys & South Atlantic35.7 ft+16.6 ft
Submarius's clarity model read Florida Keys & South Atlantic at 35.7 ft regional average; up 16.6 ft vs the prior week's read.
Florida Gulf Coast17.8 ft+12.4 ft
Submarius's clarity model read Florida Gulf Coast at 17.8 ft regional average; up 12.4 ft vs the prior week's read.
Southern California23.2 ft-7.5 ft
Submarius's clarity model read Southern California at 23.2 ft regional average; down 7.5 ft vs the prior week's read.
Hawaii50.5 ft+28.3 ft
Submarius's clarity model read Hawaii at 50.5 ft regional average; up 28.3 ft vs the prior week's read.
Northeast Atlantic17.0 ft+8.7 ft
Submarius's clarity model read Northeast Atlantic at 17.0 ft regional average; up 8.7 ft vs the prior week's read.
Mid-Atlantic & Gulf Coast8.9 ft+3.3 ft
Submarius's clarity model read Mid-Atlantic & Gulf Coast at 8.9 ft regional average; up 3.3 ft vs the prior week's read.
Notable events
Florida Keys & South Atlantic clearing — read up 16.6 ft week-over-week
Submarius's clarity model read Florida Keys & South Atlantic at 35.7 ft regional average this week, up 16.6 ft from the prior week's read. The trend supports the next 7-day windows highlighted in the in-app verdict.
Florida Gulf Coast clearing — read up 12.4 ft week-over-week
Submarius's clarity model read Florida Gulf Coast at 17.8 ft regional average this week, up 12.4 ft from the prior week's read. The trend supports the next 7-day windows highlighted in the in-app verdict.
Hawaii clearing — read up 28.3 ft week-over-week
Submarius's clarity model read Hawaii at 50.5 ft regional average this week, up 28.3 ft from the prior week's read. The trend supports the next 7-day windows highlighted in the in-app verdict.
Northeast Atlantic clearing — read up 8.7 ft week-over-week
Submarius's clarity model read Northeast Atlantic at 17.0 ft regional average this week, up 8.7 ft from the prior week's read. The trend supports the next 7-day windows highlighted in the in-app verdict.
How the model works
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.
Want this in the app?
Live verdict, water clarity bands, and a 2 day forecast at your spot — free, no signup. Pro adds the 8 day outlook.