Cool Waters Aquatic Center
✓ Last confirmed for the 2026 season
Where: 2028 S. 124th St., West Allis, Wisconsin
Season: Summer through early September; closed Mondays except Labor Day
Hours: typically daylight hours
Cost: $4.50-$11
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Milwaukee County's largest outdoor water park combines water slides with a zero-depth entry pool dotted with climbable logs and lily pads, giving splash-pad-aged kids plenty to do. Admission runs on a tiered pricing scale rather than the free entry of county spray grounds.
What's on site. OpenStreetMap maps toilets on site, playground alongside, parking at this location.
When to go. Peak summer highs in West Allis average 84°F — warm enough for a splash pad through most of the season without being punishing at midday.
If this one's closed or packed
Splash pads close for maintenance, run short seasons and fill up on hot weekends. There are 2 other pads within 5 miles and 12 within 15. These are the ones worth the drive — ranked by shade, toilets and cost first, then by how close they are: