- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 53°16'18"N 4°37'25"W
- Eastings/Northings: 225131, 378183
- OS Grid: SH251781
- Mapcode Local: GBR GNY1.QRW
- Mapcode Global: WH31J.Y1B5
Location and coordinates are for the approximate centre of Porth Castell within this administrative area.
Geographic features and populated places may cross administrative borders.