The Invercargill City Council will close the Stirling Point viewing platform to carry out repair works on the glass panels around it.
Group manager infrastructure Erin Moogan said part of the platform was blocked off in early October after the glass panels that partly surround it were smashed.
The glass had been intentionally damaged three times, she said.
Mrs Moogan said because the glass was toughened, it would need to be struck with something like a hammer for it to shatter.
The most recent incident happened in the first weekend of October when scaffolding at the site was tampered with and an attempt had been made to push it over the edge into the tide, Ms Moogan said.
"It’s a real shame the platform has been the target of this continued vandalism. I’m pleased that it will soon be fixed for everyone to enjoy once again and we are hopeful it doesn’t happen again."
Bluff Community Board chairman Ray Fife said he was disappointed the area had been targeted.
"I can’t understand these mindless acts of vandalism, especially something as beautiful as Stirling Point."
It would also be disappointing for visitors to Bluff, he said.
"I know there will be people travelling here who want to get photos with our iconic sign. That experience has now been marred."
The damaged glass panelling had been fenced off, but visitors could still get to the signpost for photo opportunities.
The cost of repairs was expected to be between $80,000 and $100,000, and would be completed within the day, Mrs Moogan said.
Ms Moogan and Mr Fife encouraged anyone with any information on the vandalism to tell Bluff police.
