- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°52'2"N 4°41'32"W
- Eastings/Northings: 218879, 333377
- OS Grid: SH188333
- Mapcode Local: GBR GPS3.WYT
- Mapcode Global: WH33F.W6R6
Location and coordinates are for the approximate centre of Porth Ty-llwyd within this administrative area.
Geographic features and populated places may cross administrative borders.