A cross sea (also referred to as a squared sea or square waves) is a sea state of wind-generated ocean waves that form nonparallel wave systems. Cross seas have a large amount of …

Feb 7, 2025 · This rare wave pattern occurs when two swells coming from different directions meet and form squares on top of the water, often resembling a checkerboard or grid.

6 days ago · This unusual appearance, where the water takes on a checkerboard or quilted pattern, is commonly known as square waves. Scientifically, this sea state is called a cross …

Nov 10, 2025 · In this article, we break down 6 essential facts about square wave formation, unpacking the science, history, and risks behind this unusual ocean pattern. We explore how …

A cross sea is a strange yet dangerous phenomenon that creates a square-shaped wave pattern near the shore. Square waves are rare but might appear anywhere.

Sep 22, 2024 · What are square waves, and why are they so dangerous? We spoke to an expert to find out everything you need to know before your next trip.

Nov 4, 2025 · Square waves form when two wave systems travel across a body of water from different directions and intersect, creating a grid-like pattern on the surface. These wave …

Mar 13, 2025 · Ocean dynamics can sometimes lead to waves from separate storms merging at sharp angles. When that overlap happens, the surface arranges itself into a repeating, square …

Oct 23, 2023 · In short, if you see a square wave, you want to get out of the water immediately as they pose real danger. However, it might not be so easy to see the pattern the two swells …

Feb 26, 2025 · Unlike typical ocean waves that roll in parallel lines toward shore, square waves form a grid-like structure that transforms the sea into what looks like a giant chess board. This …