The annual Great South Bay Music Festival returns to Patchogue today!

The four-day event kicks off at Shorefront Park at 4 p.m. Thursday afternoon and continues through Sunday night.

Situated on the magnificent Great South Bay, the festival is Long Island’s longest running, and largest music, art and cultural event.

Attendees will get the chance to see more than 55 performers on four stages, performing classic and contemporary rock, punk, indie, jam-band, reggae and funk genres.

The well-known family-friendly festival also features a children's concert and a KidZone.

‘The Used’ are set to headline on opening night, with ‘Sublime’ scheduled for Friday.

In its 18th year, concertgoers can also enjoy craft beer and wine tents, artisan and craft market, food court and more.

There are still general admission tickets available for every day of the festival.