high waves; heavy seas; rough seas
Used for dangerous or unusually high sea waves, especially in weather, marine, and coastal safety contexts.
High waves surged into the coastal area due to the typhoon.
The ferry was canceled because of heavy seas.
High waves occurred along the coast due to the typhoon.
The weather agency is urging people to be on alert for high waves.
An angler was swept away by high waves and went missing.
Strong winds caused high waves to surge into the harbor.