National Waterpark Day

National Waterpark Day on July 28, observed annually, is a joyful celebration of waterpark culture—those vibrant places full of slides, splash zones, wave pools, and lazy rivers that bring summer thrills to people of all ages.

History of National Waterpark Day

National Waterpark Day was launched in 2017 by Kalahari Resorts & Conventions, creator of some of America’s largest indoor waterparks. The company chose July 28 to honor the magic of waterparks and the lasting memories families create when they dive into summer fun. Kalahari’s celebration includes flash sales, poolside DJs, foam parties, and other festive perks at locations in Wisconsin, Ohio, Pennsylvania, Texas, and beyond.

Waterparks have deep roots: the first waterslide debuted in New Zealand in 1906, leading to the rise of indoor waterparks in North America by the 1950s. The U.S. now hosts the world’s largest concentration of over 1,000 waterpark venues.

Why is National Waterpark Day important?

This day reminds us how waterparks blend excitement and relaxation in ways few places can. One minute you’re screaming down a giant slide, the next floating on a lazy river while soaking in warm sunshine. That unique mix turns a simple outing into a memory-making experience.

It also brings communities together. Seasonal and indoor waterparks are hubs for families, friends, and groups to connect and share joy. Celebrating National Waterpark Day highlights how recreation supports well-being—and why having accessible places to play is vital in our busy lives.

• it sparks childhood nostalgia and playful energy
• it highlights how summer fun supports mental health
• it brings families together across generations
• it encourages active, splash-filled memories
• it shines a spotlight on local waterpark businesses

How to Celebrate National Waterpark Day

Start with a splash—visit your nearest waterpark, large or small, and embrace the rides that make you laugh and relax. Whether it’s tackling a towering slide or drifting in a wave pool, dive into the fun without hesitation.

Can’t make it to a park? Bring the celebration home: plan a backyard water party with sprinklers, inflatable pools, or slip-and-slides. Or gather friends for an at-home water games afternoon—water balloon tosses, sponge races, or homemade slip-n-slides bring smiles and refreshment.

• grab a swimsuit and hit the local waterpark
• pack sunscreen and snacks for a splash-filled outing
• invite friends over for lighthearted water games
• create a backyard splash zone with sprinkles or sprinklers
• share your waterpark moments using #NationalWaterparkDay

National Waterpark Day Dates Table