Morrisons Petrol Station – Caernarfon – Opening Hours & Petrol Station Details Morrisons Petrol Station is found on North Road, approximately a 0.47 mile distance north of the centre of Caernarfon (by Santes Helen RC Primary). This petrol station is a beneficial addition to the locales of Hen-maes-y-porth, Gwel y Llan, Fron Heulog, Tai Cochion, Fron Goch, Erw Coch, Caernarfon Town Centre and Caeathro. Refer to this page for information about Morrisons Petrol Station Caernarfon, including the petrol station hours, petrol station address details, product ranges and more.