Study thick, powerful waves created by abrupt depth changes, including the forecasting, equipment, positioning, and risk management they demand.

Heavy waves are the ones that make even experienced surfers stop and study the lineup before paddling out. They are not defined by size alone. A head-high slab…

Slab waves are among surfing’s most dramatic natural phenomena: thick-lipped barrels that seem to rise from nowhere, fold over shallow rock or reef, and detonate with terrifying speed.…