Post Office – Coleraine, Castlerock – Opening Hours & Branch Details You will find Post Office at 4 Main Street, a 5.51 mile driving distance north-west from the centre of Coleraine (a few minutes walk from Castlerock Beach). This branch is fittingly situated to serve patrons from the districts of Bogtown, Freehall Dunlop, Freehall Watson, Ballwoolen, Castlerock, Articlave, Liffock and Downhill. Today (Friday), operating hours begin at 8:00 am and continue until 7:30 pm. Please see this page for the specifics on Post Office Coleraine, Castlerock, including the branch hours, local map, customer feedback and additional details.