When Is Summerfest 2025. The greater sayville chamber of commerce will be hosting their annual summer festival on august 2nd, 3rd and 4th of 2025. From ticket information to what’s allowed on the festival grounds, we rounded up frequently asked questions about all things big gig to help you make the music festival as memorable as possible.

Windward beach park will come alive this july at summerfest 2025 presented by pine belt cars. Find the date, time and stage for each act here.