When is Summerfest? Music Events by da jack hayford - May 5, 2023May 5, 20230 THE 55TH ANNUAL SUMMERFEST TAKES PLACE JUNE 22-24 JUNE 29- JULY 1 JULY 6-8 Summerfest is one of the most highly anticipated music festivals of the year, held annually in Milwaukee, Wisconsin. With a dozen stages and 800 acts performing over 11 days, it is the world's largest music festival. The