Waves are created when strong winds from a weather system blow over the ocean's surface. In the immediate area, this wind action can generate sea waves (or chop).

The fetch is the distance over which the wind blows.

Sustained wind builds energy forming longer, deeper swell waves. They can travel thousands of kilometres before dying away.

Dangerous waves develop with stronger winds, a longer fetch, and more time to build. Dangerous waves can put your safety at risk and cause damage to coastlines and property.

Know your weather. Know your risk.