10 Fascinating Facts About Rogue Waves

Also known as freak waves or monster waves, rogue waves have long intrigued sailors, sea enthusiasts, and, more recently, marine scientists. These towering waves emerge seemingly without warning, creating a major risk for ships, offshore platforms, and anyone in their way. Keep reading to discover more about these remarkable natural phenomena.

1. Rogue waves are often referred to as ‘walls of water.’

Rogue waves are immense and powerful waves that suddenly appear in open waters, often reaching at least double the height of the tallest surrounding waves. Though no universally agreed-upon height defines a rogue wave, they have been observed between 26 feet and as high as 100 feet. These waves are noted for their steepness, sharp crests, and enormous destructive power, which makes them both terrifying and captivating.

2. Rogue waves don’t have a single, clear cause.

Several elements come together to form rogue waves. One key factor is the convergence of different wave systems: When waves of varying wavelengths (distance between their crests) and amplitudes (height from trough to crest) collide, they can merge and amplify one another, leading to a dramatic increase in height and force. Other contributing factors include strong ocean currents, shifting wind patterns, and the presence of underwater features like reefs or deep channels, which can focus waves in one area. Despite these known factors, rogue waves remain rare and unpredictable.

3. Rogue waves are distinct from tidal waves and tsunamis.

While rogue waves can cause damage similar to tidal waves and tsunamis, they each have unique causes and characteristics. Tidal waves are caused by the gravitational pull between Earth, the moon, and the sun, which generates sudden surges of water in rivers or narrow bays during certain tidal phases. Tsunamis, however, occur due to undersea earthquakes, volcanic eruptions, or landslides, leading to extremely powerful and widespread waves.

4. Rogue waves can disable or even sink container ships and oil rigs.

Modern ships and offshore platforms like oil rigs are designed to handle the conditions they typically encounter at sea, including waves up to a maximum height of 15 meters (about 50 feet). However, rogue waves often exceed these limits, causing significant damage. In December 2022, a massive wave struck the cruise ship Viking Polaris on its journey to Antarctica, resulting in one fatality, four injuries, and extensive damage to the vessel, including shattered windows. Rogue waves have also been behind other freak accidents globally.

5. There are more rogue waves than you might realize.

Once thought to be rare and mythical, rogue waves have proven to be more common than previously thought, with estimates suggesting that one in every 10,000 waves is a rogue. A 2019 study that analyzed 22 years of wave data from buoys found an increase in rogue wave height between 1994 and 2016. However, understanding and predicting these waves remains challenging due to the limited data available and their unpredictable nature.

6. Some regions of the world see more rogue waves than others.

While rogue waves can occur in oceans and large bodies of water around the globe, certain regions are more prone to these massive waves. The southeast coast of South Africa, where the Agulhas Current flows, is one such area. The North Atlantic Ocean, known for the convergence of the Gulf Stream and other major ocean currents, is another hotspot for these giant waves. Additionally, rogue wave incidents have been reported in parts of the South Atlantic, Indian, and Pacific Oceans.

7. Rogue waves can even form in freshwater lakes.

Rogue waves are typically associated with oceans and seas, but they can appear unexpectedly inland. A notable example is the tragic sinking of the S.S. Edmund Fitzgerald on Lake Superior in 1975. The massive freighter vanished from radar during a storm and sank off Whitefish Point, Michigan, taking the lives of all 29 crew members.

8. Several shipwrecks in modern history have been linked to rogue waves.

Although scientific evidence of rogue waves prior to the mid-1990s is limited, some researchers now speculate that certain historical shipwrecks may have been caused by them. For example, the mysterious disappearance of the U.S.S. Cyclops in 1918 may have been the result of a rogue wave or an intense storm that caused the ship to break apart, with its cargo of manganese ore pulling it to the ocean floor. In 1974, the Norwegian tanker Wilstar suffered structural damage (but did not sink), likely from a rogue wave, and in 1978, the German freighter M.S. München sent a distress signal claiming that a massive wave had struck the ship, leading to the loss of all crew members. A rogue wave is also believed to have sunk the swordfish boat Andrea Gail in the North Atlantic in 1991, a tragedy immortalized in Sebastian Junger's bestseller The Perfect Storm.

Modern cruise ships have also been damaged by rogue waves. The Bremen and Caledonian Star both had their bridge windows shattered by waves estimated to be 98 feet (30 meters) tall in the South Atlantic in 2001, with the incidents occurring just days apart. The Holland America cruise ship M.S. Prinsendam also faced two rogue waves, each 39 feet (12 meters) high, near Cape Horn in 2007 [PDF], resulting in multiple injuries and medical evacuations.

9. The Draupner wave was the first recorded measurement of a rogue wave.

On January 1, 1995, a remarkable event occurred on the Draupner oil-drilling platform, located about 100 miles off the coast of Norway. The platform was equipped with a sea surface elevation probe that captured a massive 85-foot (26 meters) wave crashing into the structure. This measurement led to the Draupner wave being the first recorded rogue wave, thereby confirming the long-suspected existence of these extraordinary phenomena.

10. Rogue waves have made their way into popular culture.

Under the Wave off Kanagawa, the iconic woodblock print by Japanese artist Katsushika Hokusai, shows a massive wave with boats in the foreground and Mount Fuji in the background. While often mistaken for a tsunami, many historians and scientists believe the print actually depicts a rogue wave, as it seems to be propelled by wind rather than an earthquake.

A rogue wave also played a key role in the 1972 disaster movie The Poseidon Adventure, although the film inaccurately attributes the wave to an underwater earthquake. In the 2005 remake Poseidon, the mistake is corrected, with a crew member sensing something is wrong just before the wave strikes the ship.