- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°51'52"N 4°41'34"W
- Eastings/Northings: 218822, 333065
- OS Grid: SH188330
- Mapcode Local: GBR GPS4.33G
- Mapcode Global: WH33F.W8FB
Location and coordinates are for the approximate centre of Porth Ty-mawr within this administrative area.
Geographic features and populated places may cross administrative borders.