Wild Waves Theme & Water Park is Washington's ONLY combination Theme and Water Park! Offering 70 expansive acres packed with thrill rides, classic fan-favorite attractions, and the region's best water park, there is something for everyone in the family to enjoy! Park is open seasonally from May through December. Ride, Splash, and Play all day May through September for summer fun, then join us in October for Fright Fest and again in December for Holiday with Lights. Gather loved ones and join us for a visit to create memories that will last a lifetime!