There are five new sculptures on the trail around Granite Island from artists Maurizo Perron (Italy), Georgina Humphries (Victoria), Stephen Harrison (NSW), Deb Sleeman (Kangaroo Island) and local Hamish McMillan.
The trail is at its peak number of sculptures; there are 23 works by artists from eight different countries. They include China, Denmark, Italy, Japan New Zealand, Slovakia, South Africa and the USA.
David Handley, who is the Founding Director of Sculpture by the Sea said Granite Island made for a "stunning" location for the trail.
"Sculptures Encounter - Granite Island is a unique exhibition that has attracted world-wide attention. You can put a sculpture in over here and it finds its own space," Mr Handley said.
"There is a significant international collection right here in regional SA which locals and people from around the world can see. The collection is already one of the most significant in regional Australia. If you like sculptures, it adds to the experience of Granite Island. If not, it's not intruding on the experience on the island.
"Visitors at Cape Jervis went out of their way to visit Victor Harbor, because of the Sculptures on Granite Island and that other visitors said they never walked across the top of Granite Island, but did, to see the sculptures.
"The artists we attract to display their work have international following and with that, it promotes Victor Harbor and Granite Island."
Mr Handley said having work by Maurizo Perron was an honour, as the artist creates one stunning room in the famous Ice Hotel in Sweden every year.
Stephen Harrison said his piece, a lighthouse at the top of the island, took about six months to create before it was part of Sculptures by the Sea at Bondi and Cottesloe.
"I started making it for my uncle Ian, who died while I was making it. He liked lighthouses and so do I," he said.
The structure is made of concrete, steel and bronze, which represents the beacon of hope and civilisation a lighthouse is.
"Having it set up in the public eye again gave it another life. What a great location to have a lighthouse," Mr Harrison said.
"Sculptures by the Sea is such a popular event and to extend it to another event such as Sculptures Encounter - Granite Island is amazing."
Georgina Humphries' installation is called Light and Gale, and is two brightly-coloured wind socks made from reclaimed tents ditched after music festivals.
She has spent eight years collecting tents from events like the Falls Festival in Lorne to create her art, which also featured at the Bondi Sculptures by the Sea.
"I'm making art as a response to the environment," Ms Humphries said.
"It represents the environment and the force of the wind in a three-dimensional form. It's using recyclable material and it's a comment on how much we throw away."
It is one of her first permanent artworks and she was excited to have it in South Australia, where part of her family lives.
"It's a great spot - you can't beat having your work next to the water and in nature," she said.
Mr Handley said the Rangers on the island said once the sculptures were installed in December 2017 there was an immediate significant increase in people visiting the island and in particular walking around the island.
"Each of the artists talks about Granite Island and Victor Harbor to their network of collectors, artists, teachers and curators around the world, connecting 'Sculpture Encounters - Granite Island' with people around the world and continuing the tradition of encounters in the area of Encounter Bay," Mr Handley said.