Summerfest 2025 Milwaukee Journal. After announcing a summerfest show at the american family insurance amphitheat­er for june 21 — with james taylor headlining — officials with the milwaukee. The lineup for the 2025 milwaukee summerfest is here!

A whopping 150 headliners were revealed wednesday, joining 29 acts previously confirmed to perform across eight stages at the milwaukee music festival june 19 to 21, june. Summerfest has announced the 20th act for its 2025 edition — acclaimed indie rocker japanese breakfast.