Post Office – Ammanford, Garnant – Opening Hours & Branch Details Post Office is located in a good place at 103 Cwmamman Road, approximately a 3.70 mile driving distance east from the centre of Ammanford (not far from Garnant Golf Club and Garnant Square). The branch is a positive addition to the local businesses of Twyn, Upper Brynamman, Brynamman, Gwaun-Cae-Gurwen, Garnant, Cwmgors, Lower Brynamman and Glanamman. Today (Friday), open hours begin at 7:00 am and continue until 10:00 pm. This page will give you all the information you need on Post Office Ammanford, Garnant, including the hours of business, location particulars, direct telephone and other info.