Milwaukee County Parks

Cool Waters Aquatic Park

Stay cool at the aquatic park with the tallest waterslides in Milwaukee County, heated pool, children's waterslides, interactive water toys, sand volleyball courts, children's playground, Cool's Cafe and more.


  • Visit
  • Events
  • Season Passes
  • Parties
  • Rentals

Admission Fees


Recreation-Provider Rate




Grab a tube and fly down the flume with a friend or take a ride down the body slide.

Water Obstacles 

Make your way across the log or lily obstacles!

Zero-Depth Entry

Cool Waters is perfect for all ages thanks to a zero-depth entry pool, water mushrooms, a playground and water slides for toddlers.


Events at Cool Waters

Opening Day

Opening Day often falls on the Saturday of Memorial Day Weekend.

Water Park Season Passes


Purchase a season pass to get unlimited entry to BOTH Cool Waters and Schulz Aquatic Center – all season long!

  • Pass holders must make a reservation to be allowed into the facility. 
    Admittance is not guaranteed without a reservation.   
  • Good at Cool Waters and Schulz Aquatic Center 
  • Not valid at Sheridan and Wilson Pools 
  • Family is defined as immediate members that reside at the same address 
  • Family Pass is minimum of 1 adult and maximum of 2 adults 
  • Weather and attendance policies apply


Gift Cards

Milwaukee County Parks gift cards can be redeemed for dozens of uses – including being used to pay for admission or concessions at Cool Waters! Gift cards are available in any amount, from $5 to $1000. Gift cards purchased online include free shipping. Card balances expire five years after purchase. Learn more!


Birthday Parties at Cool Waters


Celebrate your child's birthday with family and friends at Cool Waters and leave the cleanup to us!

Your party package includes admission and food for 10 guests, plus use of the party area for two hours and a personal party host/hostess to show you to your party area and serve your food. 

$ per party (plus $ for each additional guest up to a maximum of 30)

Birthday Menu

Each of your guests will select from the special birthday menu. Meals are served with a brightly colored, reusable beach pail, soda and an ice cream treat.

  • Hot Dog Meal: hot dog and fries
  • Chicken Nugget Meal: chicken nuggets and fries
  • Burger Meal: Hamburger and fries

You may bring your own birthday cake to your reserved party. No other carry-ins are allowed.

Booking Your Birthday Party

Make your reservations early! The number of parties scheduled in a day is limited. Book your party at least seven business days in advance. Full payment is due at booking to reserve your time.

Party Time Slots
  • 11 a.m. – 1 p.m.  N/A
  • Noon – 2 p.m.  N/A
  • 1:30 – 3:30 p.m.  N/A
  • 2:30 – 4:30 p.m.  N/A

Private Events at Cool Waters


Rent the water park for a private event! Cool Waters includes a zero-depth, heated pool, giant tube and body water slides, children’s water slides, interactive water toys, sand volleyball courts, a children’s playground and two picnic shelters. We require at least three weeks advance notice to make a reservation. To book call (414) 257-8005.

Max Rental Capacity: 600

Availability: Rentals available Fri. - Sun. N/A

What you get: 

  • Private use of the water park
  • On duty lifeguards
  • Use of the picnic shelter in Cool Waters
  • Access to locker rooms, restrooms
  • Use of sand volleyball court

Rental Fees 

Rental Fee
(includes tax)
Private Pool Rental $474.75 per hr (pool admission included)
Cool Waters Picnic Shelter* $158.25 per hr (plus pool admission)
Greenfield Pavilion Rental $390.35 up to 4-hour time block (plus pool admission)
$73.85 each add'l hour

 *available during public swim hours


Height Requirements and Demonstrated Swimming Ability for Some Attractions 

To use the giant body- or tube-slides, children must be at least 48" tall.

To use lap lanes, youth must demonstrate their swimming ability to a lifeguard by way of a swimming test. Availability of lap lanes is dependent on weather and attendance.

Children age 11 and under must be accompanied by an adult 18 years old or older.

Swimming Attire

Swimsuits required, no street clothes allowed.

Swim diapers are required for all children who are not yet potty-trained.

How to Find Us

2028 S 124th St, West Allis


9480 W. Watertown Plank Road
Wauwatosa, WI 53226
(414) 257-PARK (7275)

Connect with us on Nextdoor

This site is powered by the Northwoods Titan Content Management System