Post Office – Carmarthen, Cynwyl Elfed – Opening Hours & Branch Details Post Office is set on Cynwyl Elfed, a 5.05 mile drive north-west from the centre of Carmarthen (a few minutes walk from Y.g. Cynwyl Elfed). This branch is situated perfectly to serve those from the locales of Rhydargaeau, Esgair, Llanpumsaint, Cynwyl Elfed, Talog, Cwmduad and Hermon. If you plan to visit today (Friday), its business times are 8:00 am – 8:00 pm. Here you can find the specifics for Post Office Carmarthen, Cynwyl Elfed, including the working hours, local directions, customer feedback and further essential information.