Costa Coffee – Carmarthen – Opening Hours & Store Details Costa Coffee, which currently occupies a unit in St Catherine’s Walk Centre, is located on St Catherines Walk, about a 0.15 mile drive north-east from the centre of Carmarthen (not far from Carmarthen Bus Station). The store is convenient for the people of Carmarthen Bridge Junction, Carmarthen Junction, Pensarn, Ffynnon-Ddrain, Llangynnwr, Johnstown and Carmarthen Town Centre. This page will supply you with all the information you need on Costa Coffee Carmarthen, including the business hours, location details, direct telephone and more info.