Although they can look beautiful from shore, cross seas can create rough, unpredictable conditions. Waves approaching from different directions can make swimming difficult and can be especially challenging for small boats.
If you notice this pattern while at the beach, the safest choice is to stay out of the water until conditions improve and follow any warnings from lifeguards or local authorities. If you are already swimming and conditions suddenly become rough, prioritize getting safely back to shore and seeking help if necessary.
Square waves are not a warning that a tsunami is coming, despite claims sometimes shared online. They are a natural ocean phenomenon caused by intersecting wave systems, but their unusual conditions still deserve caution.
