Great South Bay offers multiple boat ramp access points across several towns (Babylon, Islip, and Brookhaven), with facilities ranging from single-lane to multi-lane concrete ramps accommodating 10-90+ trailer rigs.

Most ramps include amenities such as docks, boat wash-down stations, and pumpout facilities, though fees and permits are typically required; check with individual town jurisdictions for current hours, permit requirements, and specific ramp conditions before launching.