- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°1'29"N 5°0'1"W
- Eastings/Northings: 194252, 240523
- OS Grid: SM942405
- Mapcode Local: GBR CJ.GQC1
- Mapcode Global: VH1QF.8CVK
Location and coordinates are for the approximate centre of Porth Maen within this administrative area.
Geographic features and populated places may cross administrative borders.