Conwy Quay adoins the River Conwy estuary on the east side of town, separated from it by the town walls. The present quay wall dates from 1833 and is faced with large stone blocks, with contemporary stone steps at the north-west end. The north-south section of wall ends at a wall tower to the south-east of Porth Isaf, then turns obliquely before continuing closer to the town wall in a later and less well built form. There is a slipway opposite the Postern Gate, together with a harbour masters office.

To the south a rising wall retains the quay access road from its junction with the former A55, a wall that is probably contemporary with the 1958 road bridge. The area below the retaining wall is protected by a double sheet piled 'training wall' extending seaward in a north-westerly direction.