This natural phenomenon is called a “cross sea” and while it’s mesmerizing to watch it can be extremely dangerous for anyone caught in it, including boats, surfers and especially swimmers.
This beautiful ocean phenomenon happens when the waves collide from different angles and form squares in the water. The image above is from Île de Ré, an island off the west coast of France where “cross seas” is a common occurrence.
It happens when waves from one weather system continue even though a change in the wind has created different waves.
But what lies under this amazing sight are currents that can throw anything in its path up in the air, including something as large as a ship.
It’s hard to determine what has caused ships to wreck but researchers believe many vessels have capsized as a result of these cross seas.
Boats and ships are supposed to hit waves head on but if a vessel has waves coming at it from all angles it’s very dangerous.
You must always stay out of the ocean and warn others if you see criss cross waves. But please enjoy them from afar, or by watching them in the clip below.