Post Office – Newcastle Emlyn – Opening Hours & Branch Details Visit your local Post Office branch at 6 Sycamore Street, about a 0.05 mile distance north-east of the centre of Newcastle Emlyn (by Castell Newydd Emlyn Marchnad Wartheg and Eglwys Drindod Sanctaidd). This branch primarily provides service to patrons from the districts of Pont Ceri, Castell Newydd Emlyn, Cwmcou, Dolybryn, Bwlch Cae Brith, Adpar, Llandyfriog and Ddol. Today’s hours of business (Friday) are from 6:00 am to 7:30 pm. This page includes information for Post Office Newcastle Emlyn, including the hours of operation, address info and customer experience.