Post Office – Coleraine, Waterside – Opening Hours & Branch Details You can visit Post Office at 2 Castlerock Road, a 0.58 mile distance west from the centre of Coleraine (by A2 / Castlerock Road). This branch is available for the people of Coleraine Town Centre, Spittle Hill, Rinvarna Court, Waterside, Killowen, Millburn Road and Churchland. If you plan to swing by today (Friday), its business hours are 9:00 am to 5:30 pm. For further information about Post Office Coleraine, Waterside, including the working times, place of business address and customer feedback, please refer to the sections on this page.