Oxwich Bay is on the south of the Gower Peninsula, Wales.
Its landscape features sand dunes, salt marshes and woodland. Oxwich Bay includes a 2+1⁄2-mile (4 km) long sandy beach, accessible from the village of Oxwich. It is a popular spot for swimming and watersports including diving, sailing, water skiing and windsurfing. There is a public footpath along the cliffs from Oxwich Bay, around Oxwich Point, and to Port Eynon Bay. Buses run every couple of hours between Oxwich and Port Eynon. A wetland site at the rear of the dunes forms Oxwich Burrows National Nature Reserve. The dunes are crossed by a small stream called Nicholaston Pill. The bay ends at the eastern end with the cliffs of High Tor; but at low tide, a continuous sandy beach connects with Three Cliffs Bay. Within the nature reserve there are rare plants such as the dune gentian and the round-leafed wintergreen, insects such as the small blue, beachcomber beetle and the hairy dragonfly while the wetlands are important for birds, a bird hide is located at Whitestones which is accessed by a boardwalk through the wetlands from the car park.