Post Office – Carmarthen, Rhydargaeau – Opening Hours & Branch Details Post Office is found on Rhydargaeau, a 3.80 mile driving distance north-east of the centre of Carmarthen (nearby Ysgol Gynradd Peniel). This branch is pleased to provide service to patrons within the districts of Bronwydd, Llanllawddog, Bronwydd Arms, Peniel, Pontarsais, Rhydargaeau and Rhydryfo. Today (Friday), its business hours are 9:00 am to 5:30 pm. This page will supply you with all the information you need about Post Office Carmarthen, Rhydargaeau, including the working times, branch address, direct number and additional significant details.