“These intersecting waves create complex water movements that can easily knock swimmers off balance or overwhelm boats,” explains marine safety specialist Dr. Karen Mitchell. “The irregular wave patterns increase the risk of strong currents and underwater turbulence.”

Square waves often develop during periods of changing weather conditions or when waves generated by different storms converge. While they may look intriguing, these formations are a clear signal to be cautious.

Lifeguards and safety officials recommend that beachgoers pay close attention to wave patterns before entering the water. If you spot square waves, it’s best to leave the ocean and wait for calmer conditions.

In addition to square waves, other signs of hazardous ocean conditions include rip currents, sudden changes in water color, and