Lelant Beach is a small beach that marks the eastern extent of the dunes and is east facing, toward the dunes across the estuary (Harvey Towans). The main beach is Porthkidney Beach, which is on the western side of the estuary and is north facing.
Lelant Beach is backed by hard cliff and stone wall sea defences.
The north facing Porthkidney Beach is wide and gently sloping. The sand is very soft and medium-fine grained with a high shell content. The active face is high and steep with some slumping at the toe. There is fresh sand exposed on the Lelant Beach side.