Canada's Wonderland is getting ready to make a splash this May with the opening of its beloved water park. Though the first day of summer is just a month away, it looks like Canada's Wonderland is bringing the heat early. Clear your weekend and get your swimsuit out because its water park is officially opening to the public on May 24, 2025. As if you needed more of a reason to visit Canada's Wonderland, Splash Works has 18 water attractions for all ages. Sounds like it's about to be an exciting summer at Canada's Wonderland this year.