News Oceans This AI can predict ship-sinking ‘freak’ waves minutes in advance Anticipating rogue waves could help save lives Rogue waves are dangerous swells that rise at least twice as high as the surrounding waves, often taking ships and beachgoers by surprise. The most extreme rogue wave on record appeared offshore of British Columbia in 2020, rising 17.6 meters high, or nearly three times the height of the waves before and after it.