Essex Marina sits on the south shore of the River Crouch at the western end of Wallasea Island, positioned opposite Burnham-on-Crouch at 51°37. 34'N, 0°47. 85'E.

A privately owned, family-run facility, it offers 500 deep-water moorings — including 50 swinging moorings — all accessible at any state of the tide.

As the only marina actually situated in the river rather than behind the bank, its pontoons run parallel to the tidal flow. Located roughly seven miles from Southend, the marina draws boaters from across the south-east.

A seasonal passenger ferry links it to Burnham-on-Crouch town quay, with the crossing taking around ten minutes. The surrounding River Crouch estuary is noted for its cruising grounds within an area of outstanding natural beauty.