The search for missing Belgian backpacker Theo Hayez has finished without finding any evidence of what happened to the 18-year-old, who has not been seen for more than a month.

Police, emergency services and volunteers conducted an extensive search of the area around Byron Bay, where Mr Hayez was last seen, after he was reported missing on June 6.

Police abseilers conducting the final physical search for Theo Hayez before efforts were suspended. Credit:Danielle Smith

Byron Bay Police Commander Superintendent Dave Roptell on Wednesday thanked the local community on behalf of the NSW Police Force, Mr Hayez's family and the Belgian authorities for assisting with the search.

"It’s times like this which shows the strength of our community. We want to thank each and every person who assisted and who provided support," Superintendent Roptell said.