What are Sneaker Waves?
Sneaker waves are disproportionately large ocean waves which appear suddenly and without any warning at all. Since sneaker waves are unexpected, they represent a serious hazard to both people and ship traffic. Some regions of the world are more prone to sneaker waves than others, leading to posted warnings and advisories to make visitors aware of the issue. However, any ocean or large body of water has the potential to form sneaker waves, so you should always be cautious around water.
Unlike a tsunami, a sneaker wave is not a predictable event. Sneaker waves form when several smaller waves combine their energy, creating a single big wave. This can happen as a result of the disruption of ocean currents, or because of subtle changes in weather and topography. Sneaker waves follow no known pattern, and they will interrupt the established wave pattern, so even if you think you know the water, you should be careful. Sneaker waves are very strong, and they can kill you.
In most places around the world, waves flow more or less in cycles. These cycles can be studied and predicted; this is a skill which is familiar to many surfers, fishers, and other people who spend a lot of time around the ocean. Once people learn wave patterns, they can be aware of predicted lulls and larger waves. However, knowing the predominant wave pattern in an area will not protect someone from sneaker waves.
The height of a sneaker wave can be significantly higher than the waves which precede and follow it. Sneaker waves have been known to crest headlands, pulling down hikers and ocean-watchers. They can certainly yank someone from a beach or rock piling, and they can also carry debris which may cause serious injuries. On the open ocean, sneaker waves have swamped ships; even massive tanker ships are not immune to the dangers of freak waves.
When you are around a large body of water, protect yourself from sneaker waves by never turning your back to the water. If you want to nap on the beach, make sure that a companion stays awake to keep an eye on things. Watch out from small children and pets, who may not be aware of the danger, and avoid standing close to the edge of promontories and headlands. Always make sure that you have a clear escape route away from the ocean, and avoid slippery jetties and docks.
Written by S.E. Smith
