Water slides have been a cruise ship staple for decades, but today's at-sea coasters are a far cry from those early deck additions. The modern breed features transparent acrylic tubes, magnetic launch technology, multimedia show elements, and drops of up to seven decks — with portions of the ride extending out over open ocean. Here's a look at four of the most notable water coasters currently sailing.
Disney Cruise Line got the ball rolling back in 2011 when the AquaDuck debuted on the Disney Dream — the first water coaster of its kind at sea. Stretching 765 feet and sending riders 150 feet above the ocean surface, it uses 10,000 gallons-per-minute water jets to propel one or two riders through a transparent tube that loops past the ship's pools and even threads through the bright red funnel. A sister version launched on the Disney Fantasy in 2012. The line's newer AquaMouse, introduced on the Disney Wish in 2022 and later on the Disney Treasure (2024) and Disney Destiny (2025), builds on that concept with 60 lighting, animation, music, and film-clip features woven into the 760-foot ride — with storylines that change depending on which ship you're sailing. Both AquaDuck and AquaMouse are included in the cruise fare.
Royal Caribbean's Blaster on the Navigator of the Seas claimed the title of longest water coaster at sea when it launched in 2019. At 800 feet and with a seven-deck drop, it edges out the AquaDuck in both length and height over the ocean (159 feet vs. 150 feet). Five hydraulic water jets power the twists, turns, and loops, and like Disney's offerings, it's complimentary for guests. Norwegian Cruise Line entered the conversation in 2025 with the Aqua Slidecoaster on Norwegian Aqua — billed as the world's first hybrid roller coaster and water slide. Magnetic launch technology rockets riders to speeds up to 30 mph along two side-by-side tracks on the ship's top three decks, circling the funnel twice in a 60-second, 651-foot ride. The side-by-side layout lets guests race each other, which adds a competitive twist not found on the other coasters.
Each ride has its own personality: the AquaDuck and AquaMouse lean into family storytelling and views, the Blaster prioritizes pure length and height, and the Aqua Slidecoaster goes hard on speed and racing. Height and weight minimums vary by ride, so it's worth checking requirements before little ones get their hopes up. All four are included with the base cruise fare.
This roundup was originally reported by TheTravel.
