11th Annual Great South Bay Music Festival - July 13, 14, 15 & 16, 2017. The Longest Running, and Largest Celebration of Musi ... c, Art and Heritage on Long Island. 3 Stages, 50+ Artists : Rock, Jam, Funk, Jazz, Folk, Blues, & Craft Brews! KidZone, Arts & Crafts, Diverse Food Court, Great Music - Great Crowd!! Shorefront Park, Patchogue, New York read more