Post Office – Newcastle Emlyn, Cenarth Mobile Service – Opening Hours & Branch Details Visit Post Office on Within Glan Yr Afon Estate, a 2.76 mile distance west of the centre of Newcastle Emlyn (a few minutes walk from Cenarth Ysgol Gynradd and Ysgol Cenarth). People can easily get here from Llanygwydd, Abercych, Cenarth, Penrhiw, Llandygwydd and Brongwyn. For the whole day (Friday) it’s not open. This page will give you all the information you need on Post Office Newcastle Emlyn, Cenarth Mobile Service, including the open hours, branch address, telephone number and other important info.