Square Waves Are a Thing — and If You See Them, Get Out of the Water Immediately

What are square waves?

SQUARE WAVES! 🌊 Spotted along Lake Michigan in Port Washington, Wisconsin. They are known as a “cross sea”, when two swells meet to form a checkerboard pattern. They are best to observe from a distance and can be very dangerous. Credit: Michael Salm | WeatherView

Rare square wave spotted off of Venice beach today. "Square waves," also known as cross seas or grid waves, are a rare and dangerous ocean phenomenon where two sets of waves traveling at different angles collide, creating a grid-like pattern and unpredictable currents. This video from Mikie Russell Richards | Bob Harrigan - ABC 7

Square Waves in Ocean Settings Are Rare But Dangerous