Rhossili Bay curves along an arc running northwards from the village. The sandy beach is three miles long and is backed with sand dunes. Locals refer to the beach as Llangennith Sands. Behind the beach just north of the village is Rhossili Down with the highest point on the Gower Peninsula, the Beacon (193 metres), and a number of prehistoric remains. It is between Rhossili Down and the beach proper that the Warren is found.
At the southern end of the Bay is the small tidal island called Worms Head. At the north is Burry Holms. These islands are accessible at low tide only. Also at low tide, it is possible to see the remains of several shipwrecks, wood from the wreck of the Helvetia being the most prominent when looking north from Rhossili. Worms Head consists of two islands, Inner and Outer Head. Outer Head reaches 56 metres in height, Inner head 47 metres.
Rhossili Bay featured in the Opening Ceremony of the London 2012 Olympic Games, a youth choir began a cappella performances of "Bread of Heaven" live on the beach which was broadcast at the Olympic Stadium. The bay has been used as the setting of New Earth in the sci-fi show Doctor Who and the bay including the Old Rectory was used in Torchwood: Miracle Day. In 2014, it was voted the UK's number one beach, third best in Europe, and 9th best in the world, by TripAdvisor users.