Whitewash
The rolling wall of foam left behind after a wave breaks, sitting just behind the curl at the back of a wakesurf wave's rideable face.
Recreation
Whitewash is a term from limnology — the scientific study of inland waters. The detailed explanation below covers the definition, why the concept matters to lake water-quality interpretation, and how it relates to the A–F grade. Reading Whitewash alongside the A–F grade makes the grade easier to follow — each graded parameter maps onto an established limnological concept.
The per-lake pages on LakeQuality always show the specific Whitewash value for that lake, so you can move from the general concept to the specific lake without leaving the site.
What It Means for Your Lake
Whitewash (whitewater) is the turbulent, aerated foam created after a wave breaks. On a wakesurf wave it forms the churning region just behind the curl, marking the rear edge of the clean, rideable face. Riders stay ahead of the whitewash on the smooth face within the pocket; drifting into the whitewash typically means losing the wave's push and falling off the back.
Frequently Asked Questions
What is whitewash?
The rolling wall of foam left behind after a wave breaks, sitting just behind the curl at the back of a wakesurf wave's rideable face.
Why does whitewash matter for lake health?
Whitewash (whitewater) is the turbulent, aerated foam created after a wave breaks. On a wakesurf wave it forms the churning region just behind the curl, marking the rear edge of the clean, rideable face. Riders stay ahead of the whitewash on the smooth face within the pocket; drifting into the white...
Related Terms
The steepest breaking part of the wave where it pitches over into whitewash, marking the powerful edge of the pocket.
The steepest, most powerful section of the wave next to the white water, where the push is strongest and where riders want to stay.
The clean, unbroken sloping surface of the wave that a wakesurfer rides on, ahead of the curl and whitewash.
The forward force a wakesurf wave exerts on the board that propels the rider and keeps them with the boat once the rope is released.
Source: EPA National Aquatic Resource Surveys, 2026.