Fowey is a deep water port accessible in all weather and all states of the tide. The harbour entrance lies between St Catherine's Castle on the West side and the Polruan Headland on the East side.
All vessels in excess of 37.5m require a compulsary pilot in the lower harbour from 20 metres above Prime Cellars.
 
Ships over 92 metres are required to swing in the lower harbour and are then towed astern by the harbour tug/s to the loading berths which are situated on the Western bank of the channel approximately 2km from the harbour entrance.
 
Ship movements are generally carried out at slack water.