Penarth is a town in the Vale of Glamorgan (Welsh: Bro Morgannwg), Wales, 5.2 miles (8.4 km) south west from the city centre of the Welsh capital city of Cardiff and lying on the north shore of the Severn Estuary at the southern end of Cardiff Bay. Penarth is the wealthiest seaside resort in the Cardiff Urban Area, and the second largest town in the Vale of Glamorgan, next only to the administrative centre of Barry.