Post Office – Montrose, Johnshaven – Opening Hours & Branch Details Post Office can be found in a convenient position at 1 New Road, approximately a 7.79 mile drive north-east of the centre of Montrose (by Johnshaven Primary School and Lathallan School). This branch is properly situated to serve customers from the areas of Craigo, Marykirk, Hillside, St Cyrus, Johnshaven, Dubton and Benholm. Unfortunately, it will be closed the whole day (Friday). Here you can find some information about Post Office Montrose, Johnshaven, including the opening times, map and phone info.