- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 49°55'3"N 6°18'37"W
- Eastings/Northings: 90703, 10852
- OS Grid: SV907108
- Mapcode Local: GBR BXTW.SG1
- Mapcode Global: VGYC4.KBVF
Location and coordinates are for the approximate centre of Porth Mellon within this administrative area.
Geographic features and populated places may cross administrative borders.