Jazz in the Park 2026 in Milwaukee returns to Cathedral Square Park on Thursdays from June 4 through September 10, 2026 (excluding July 2, 9, and 16), featuring free live music, food, and drinks. The series showcases jazz, salsa, blues, and funk, with new 3 PM afternoon markets preceding the evening concerts. - Bring your lawn chairs & settle in, for a great night of music!