- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°48'7"N 4°42'49"W
- Eastings/Northings: 217167, 326169
- OS Grid: SH171261
- Mapcode Local: GBR GPQ9.5MF
- Mapcode Global: WH33M.KTMS
Location and coordinates are for the approximate centre of Carreg Wystrys within this administrative area.
Geographic features and populated places may cross administrative borders.