- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°47'37"N 4°17'35"W
- Eastings/Northings: 245470, 324254
- OS Grid: SH454242
- Mapcode Local: GBR 5H.X1KV
- Mapcode Global: WH455.01WL
Location and coordinates are for the approximate centre of Tremadoc Bay within this administrative area.
Geographic features and populated places may cross administrative borders.