Tenby Castle beach is situated between the North and South beaches. There are no car parks nearby, and access is through the town and down a slipway or tide permitting, along the shore from South Beach. The beach is sand backed by limestone cliffs with a few small caves and overlooked by hotels. On the north side of the beach the sea deepens quickly, and boat trips to Caldey leave from here. St Catherine's Island (on the right, top) is privately owned and has some walk-through caves beneath it which can be explored on a low tide. The more adventurous could try swimming through them on the high tide, but be prepared for a strong current flowing from north to south.
Facilities include toilets, showers and a cafe on the slipway, whilst the cafes, pubs and shops of Tenby are only a short walk away. Lifeguards patrol from late June until early September and a dog ban operates south of a line between the bottom of the slipway and St Catherines from 1st May to 30th September.