Post Office – Ballycastle, Rathlin Island – Opening Hours & Branch Details You can find Post Office at 6 Church Bay, a 6.54 mile distance north from the centre of Ballycastle (nearby Saint Marys Primary School and Saint Thomas Church of Ireland). This branch is properly situated to serve customers from the areas of Mullindress, Ballynagard, Glebe, Craigmacagan, Church Bay, Ballyconagan, Demesne and Church Quarter. Today’s working hours (Friday) are from 10:00 am until 2:00 pm. Here, on this page, you can find further information about Post Office Ballycastle, Rathlin Island, including the opening times, branch location and telephone number.