The four-day Great South Bay Music Festival kicks off Thursday on the bay, in Patchogue’s Shorefront Park to be precise.

Long Island’s premier outdoor music festival is now celebrating 10 years on the bay.

To mark the occasion, here’s a video and 10 photos from the festival’s 2015 installment from co-publisher Mike Busch.

These are all photos of jam band and water quality advocates Soundswell.

Headliners this year include Third Eye Blind, Blues Traveler, Graham Nash and Colin Hay.

scroll down for photos

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