Hellfest is back in Clisson from June 18 to 21, 2026. As ever, the extreme-music festival pulls out all the stops, bringing in a host of talented artists that will let festival-goers let loose. So, which acts are must-sees on Sunday? Here are five bands you can’t miss on Sunday, June 21, 2026 in Clisson for the new and 19th edition of Hellfest.
