Monkstone Beach is situated south of Monkstone Point, which is roughly midway between Saundersfoot and Tenby. Roadside parking (free) is available on the lane to Trevayne Farm camping site. A permissive path runs through the farm to the coastal path from where a well-maintained steep path with 190 steps continues down to the shore. The beach is mostly fine sand backed by a pebble bank. At high tide most of the sand is covered, but this is a good beach for sea swimming during this time. The rocks near the headland are popular for diving and jumping.
The southern end of the beach is rockier, with streams, rockpools and a waterfall where a small stream drops onto the beach. It becomes accessible from low to mid-tide, whilst during high tide it offers good snorkelling. The cliffs at this end are of shales and sandstones and are very unstable. The coast path can be accessed at this end by walking up a steep rock slab. Only on the very low spring tides is it possible to proceed further along the shore towards Tenby. In the opposite direction it's possible to walk to Saundersfoot along the shore at low tide, the critical cut-off point being just the other side of the headland.
There are no facilities at the beach, but Trevayne Farm has a small shop selling local produce and ice-cream. It's an ideal beach for families seeking a quieter, more rural beach than Saundersfoot or Tenby, and dogs are allowed at all times.