Porthcawl is located in Cardiff city, United Kingdom at the 51.479, -3.7036 coordinates. Distance from Porthcawl to other cities. are listed below, click on the city name to find distance between. Distance from Porthcawl to Swansea 23 km, to Newport 50 km, to Rhondda 27 km. The green marker indicates the location of Porthcawl.