- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°56'54"N 4°33'49"W
- Eastings/Northings: 227849, 342084
- OS Grid: SH278420
- Mapcode Local: GBR 54.L7VV
- Mapcode Global: WH447.V5Y0
Location and coordinates are for the approximate centre of Carreg yr Afr within this administrative area.
Geographic features and populated places may cross administrative borders.