- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 53°21'33"N 4°33'48"W
- Eastings/Northings: 229502, 387784
- OS Grid: SH295877
- Mapcode Local: GBR HM3T.GCY
- Mapcode Global: WH423.WT2H
Location and coordinates are for the approximate centre of Porth Trwyn within this administrative area.
Geographic features and populated places may cross administrative borders.