Porth Isallt-bach is a bay in Trearddur, Isle of Anglesey
Built-Up Area: Trearddur
Parish/Community: Trearddur
Unitary Authority: Isle of Anglesey
Region: Wales
Category: Water Feature
Type: Bay
Latitude/Longitude: 53°16'46"N 4°37'34"W
Eastings/Northings: 224993, 379060
OS Grid: SH249790
Mapcode Local: GBR GNY1.3L1
Mapcode Global: WH31B.XT4N
Location and coordinates are for the approximate centre of Porth Isallt-bach within this administrative area.
Geographic features and populated places may cross administrative borders.