Portmellon is a coastal settlement in south Cornwall, England, United Kingdom. It is one mile south of Mevagissey and six miles south of St Austell.
Portmellon lies within the Cornwall Area of Outstanding Natural Beauty (AONB). Almost a third of Cornwall has AONB designation, with the same status and protection as a National Park.
The sandy beach at Portmellon is safe for bathing and there is a public slipway for launching boats. Portmellon has a long history of building boats with many wooden–hulled boats leaving the workshop over the years, including Denis Hame's 20-footer named Vivian.
The sandy beach is set in a small cove, a 20-minute walk from Mevagissey. The beach is around 150 metres long but is completely covered at high tide. At low tide there are plenty of rock pools to explore. Swimming here is considered safe but there are no lifeguards on patrol. On some occasions seals can be seen swimming off the beach or resting on the rocks.
The true nature of this delightful little east facing cove is betrayed by the fact that all the houses along the sea front have stout wooden shutters which can be closed over their windows for those times when storms drive the waves over the sea wall.