Post Office – Orkney, Deerness – Opening Hours & Branch Details Post Office is situated in a convenient position on Deerness Stores, approximately a 7.93 mile distance south-east from the centre of Orkney (nearby Sandi Sand). It is open 9:30 am until 12:30 pm today (Friday). This page will provide you with all the information you need about Post Office Orkney, Deerness, including the operating hours, place of business address, direct number and further pertinent details.