- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 51°51'6"N 5°20'2"W
- Eastings/Northings: 170492, 222286
- OS Grid: SM704222
- Mapcode Local: GBR C2.TKMC
- Mapcode Global: VH0TK.HQJ6
Location and coordinates are for the approximate centre of Ogof Cantwr within this administrative area.
Geographic features and populated places may cross administrative borders.