Swansea Marina sits in a former commercial dock in the city's Maritime Quarter, at the junction of the River Tawe and Swansea Bay.

Access from the sea requires locking through the Tawe Barrage (call sign "Towee Lock" on VHF 16/18), then passing through the Marina Lock, which maintains water levels approximately one metre above the impounded barrage level.

Traffic lights at both the Marina and Tawe Barrage control vessel movements. The marina holds around 410 leisure berths, with an additional 200 berths located near the mouth of the River Tawe.

Vessels can contact the marina on VHF Channel 80; the waypoint position is 51° 36′. 40N, 03° 55′. 60W.