Six Flags Great Adventure in Jackson, New Jersey, does not have water slides within the main theme park itself, but it is located immediately adjacent to Six Flags Hurricane Harbor, which is one of the largest water parks in the Northeast. In 2026, a separate ticket or a specific Gold/Diamond season pass is required to enter Hurricane Harbor. The water park features over 20 high-speed water slides, including the "King Cobra," which sends riders through a 25-foot plunge into a snake's mouth, and the "Big Wave Racer" mat-sliding complex. If you are inside the main Great Adventure theme park (the dry park), the only water-based attractions are the Congo Rapids (a river rafting ride) and the Sawmill Log Flume; these provide a splash but are not "water slides" in the traditional sense. For the full slide experience in 2026, guests typically spend one day at the theme park for roller coasters and a second dedicated day at Hurricane Harbor for the water attractions.