Post Office – Arisaig – Opening Hours & Branch Details Post Office is positioned on The Spar, about a 0.17 mile drive west from the centre of Arisaig (near Post Office). This branch is available for the people of Carnach, Back of Keppoch, Arisaig Town Centre and Crawton. If you would like to stop by today (Friday), it is open 8:30 am until 9:00 pm. On this page, you can find operating times, branch address details, email address and further information about Post Office Arisaig.