Extreme heat and humidity is expected this week, so Summerfest will temporarily modify its water carry-in policy for Thursday, July 2, and Friday, July 3, 2026. Fans may bring in one factory-sealed plastic water bottle (20 ounces or less) to Henry Maier Festival Park, excluding the American Family Insurance Ampitheater. Summerfest will also offer the following: • Misting stations and drinking water fountains are available throughout the festival grounds.