Watch House Bay (also known as Watch Tower Bay) is what remains of the channel which once separated Barry Island from the mainland. It lies between Friars Point and Cold Knap Point, both headlands consisting of carboniferous limestone. The beach is mostly sand and a few rockpools, with low cliffs to the west side and a breakwater on the east side. The back of the beach has become silted up, and is home to a few abandoned boats. Dogs are allowed at all times.
The main car park (P&D) for Barry Island is at the north-east corner of the beach, from where access is a level walk of about 400 yards along the side of the beach. Parking near the west side (from where the photo was taken) is difficult. Barry and Barry Island rail stations are both within easy walking distance.