A small harbour has been create by utilising the protection of a rocky outcrop at the northern end of the bay.

Event and Historical Information:
This inlet has been used since the Middle Ages for the fishing, shipbuilding and for the export of slate from the cliff quarries. The Royal Charter Gale washed much of the evidence for this acitivity away. However, Admiralty Sailing Directions dating to 1870 still note Dinas as 'a safe little boat harbour, conveniently situated for the few boats engaged during the herring season, partly protected by some low-water rocks lying to a short distance below the low water mark'.

Sources include:
Admiralty, 1870, Sailing Directions for the West Coast of England from Milford Haven to the Mull of Galloway including the Isle of Man, pg28
Driver, T, 2007, Pembrokeshire: Historic Landscapes from the Air, RCAHMW, pg153
OS 1st edition mapping

Mairitme Officer, RCAHMW, August 2014.