Kangaroo Island residents opposed to oil drilling in the Great Australian Bight will gather at 11am this Sunday, May 5 at Emu Bay beach for "Hands across the Sand".
Norwegian oil company Equinor meanwhile is moving ahead with plans and has submitted its environmental plan for its Stomlo-1 well located 500 km west of Kangaroo Island.
Local organiser Linda Irwin-Oak said 41 local KI businesses were helping to promote the event on Sunday.
KI Deputy Mayor Bob Teasdale will attend to listen to community concern and judge the sand castle competition at 12.30pm.
Raptor Domain have donated the prizes, while Lisa Mermaid is doing face painting between and the Beach Barista is giving free tea or coffee, BYO cup please, to supporters of the event.
"Look for coloured flags and signage for beach action location," Ms Irwin-Oak said. "Looking forward to seeing everyone on the beach holding hands in solidarity with the world."
Island Board Riders will also be hosting a Hands across the Sand event at Vivonne Bay on Sunday, May 5 in support of the Emu Bay event.
Hands across the Sand was an event that brings people from all parts of the community together, symbolising drawing a line in the sand against offshore drilling and promoting a just transition to clean energy, she said.
"This day of action started in the US in 2010 after the BP oil spill disaster in the Gulf of Mexico and has since grown internationally as the recognition from communities grows that our oceans should not be oil fields," she said.
"Let's stand together to send a message to Equinor and our Government that we say no to risky and dirty deep sea drilling in the Great Australian Bight! Bring friends, family, placards and any creative element you want to bring to the action."