- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 53°16'49"N 4°37'45"W
- Eastings/Northings: 224810, 379173
- OS Grid: SH248791
- Mapcode Local: GBR GNY1.28W
- Mapcode Global: WH31B.VSTZ
Location and coordinates are for the approximate centre of Porth yr Afon within this administrative area.
Geographic features and populated places may cross administrative borders.