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.
Facilities include toilets ♿, showers and a cafe on the slipway, whilst the cafes, pubs and shops of Tenby are only a short walk away.
The sea on the north side deepens quickly. Boat trips to Caldey leave from here. The privately owned St Catherine's island (on the right, above) with its fort can be reached at low tide, and has some walk-through (or swim through at high tide) caves beneath it. 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.