Glasson Dock Basin sits at the seaward end of the 2. 5-mile Glasson Branch of the Lancaster Canal, providing the canal's connection to the sea via the River Lune estuary.

Managed by Canal & River Trust, the basin historically served as a major commercial dock importing cotton, sugar, and spices, and was completed in 1787. The Glasson Branch linking it to the main Lancaster Canal opened in 1826.

Access from the sea is tidal and restricted, with the dock in the River Lune reachable for only around 45 minutes before local high water. Vessels pass through the commercial dock to reach the basin and the adjoining Aquavista marina beyond.

As of late 2025, the sea gate had been undergoing repair but boats were again able to use the basin lock and reach open water, though some restrictions remained in place.