- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°23'18"N 3°57'45"W
- Eastings/Northings: 266542, 278543
- OS Grid: SN665785
- Mapcode Local: GBR 8X.QR08
- Mapcode Global: VH4FM.87J7
Location and coordinates are for the approximate centre of Tair Llyn within this administrative area.
Geographic features and populated places may cross administrative borders.