Great South Bay offers multiple public boat ramp access points in Suffolk County, including facilities at Captree State Park (67 parking spaces, multi-lane concrete ramp with pumpout and washdown), Heckscher State Park (90 parking spaces, multi-lane concrete ramp with pumpout), and several municipal ramps in towns like Babylon, Copiague, and Lindenhurst.

Most ramps accommodate trailered boats with varying amenities; some require permits or day-use fees, so contact the managing jurisdiction before visiting.