1980s The water park opened in 1986 with a kids' water playground named Dolphins' Bay with multiple Splash Pads, Dry Playground, seven children's water slides and a wading pool.
1990s Pending competition from
Canada's Wonderland's new water park,
Splash Works, influenced the addition of large wave pool at Wild Water Kingdom in 1992. This wave pool remains the fourth largest in Canada behind those found at Wild Water Works in Hamilton, Splash Works at Canada's Wonderland, and Calypso Waterpark in Ottawa. In 1995, Wild Water Kingdom added two water slides Cyclone and Devil's Drop. They also built a
Lazy river. Wild Water Kingdom installed a hot tub and added
batting cages and
mini golf courses in 1997. More slides were built and many food-service chains such as
Pizza Pizza and Mr. Sub began partnership with Wild Water Kingdom.
2000s In the early 2000s, many new water attractions were added to the park including Midnight Express, The Abyss, and Nightrider. In 2008 the hot tub was removed. Throughout the late 2000s, Wild Water Kingdom focused on expanding their saltwater attractions and in 2009 the Wave Pool was retrofitted to be filled with saltwater becoming the first of its kind in Canada.
2010s New bars were added and Wild Water Kingdom announces their first mascot, "Hugo the Hippo."
BeaverTails opened at the park as part of the dining options. In July 2012 a new
zip line attraction called Face Drop was added. The first of its kind in Canada, Face Drop has four 1,200-foot long high-tension cable rides that can be reaching speeds of 50 km/h In May 2015, Wild Water Kingdom announced that it would be closed for the 2015 season while it underwent major renovations and expansions. The water park remained closed during the 2016 season for continued renovations but the sports complex and golf driving range remained open.
Premier Parks, LLC, the operator of multiple attraction properties in Canada and the United States, acquired Wild Water Kingdom in July 2016. They announced a complete rebuild. The new expansion includes the renovation and renaming of most of the old slides, plus five new slides and two new kiddie attractions. The park reopened for the 2017 season on June 30, 2017, and was renamed Wet 'n' Wild to match with
its sister parks after several sneak peeks.
2020s The park did not open for the 2020 season due to the restrictions placed by the Government of Ontario to combat the
COVID-19 pandemic, as such, 2020 season passes and tickets were extended to cover the park's 2021 season. The park officially reopened to the general public for the 2021 season on July 7, 2021. An online reservation system was put in place for guests to book the date of their visit and time of arrival, with health screenings and face masks required for guests. The park was also open for the 2023 season. == Hosted events ==