Hello Aleksander,
Welcome to planDisney! I love your summer plan to visit a Disney Water Park, and thanks for bringing us this fun question. The perk being offered this year of
free water park admission on arrival day for all Disney Resort guests is such an exciting deal!
While we do not yet know for sure which water park will be open this July, I recommend watching the
park operating calendar. Currently, Blizzard Beach is open and serving guests. This is the park that has been open the past few months, and they'll be hosting a fun
30th Anniversary Celebration during the month of April. Often times they toggle back to
Typhoon Lagoon operating during the summer months... so if I had to guess, I'm thinking Typhoon Lagoon is the water park you'll be enjoying this July!
Whichever location you end up visiting, I'm certain you'll enjoy the magical water slides, lazy river, wave pool, and more awaiting you during your splashtastic day of fun! I highly recommend looking for the Joffrey's Coffee stand and trying the mini donuts. So delicious!
Sending pixie dust and wishing you a wonderful visit! Please stop by planDisney again anytime, and let us know if we can help with any additional questions you may have.
Just keep swimming!
Tami