Yesterday Napier Mayor Bill Dalton said he would have been disappointed if the fire was deliberately set.
It would not have been the first time vandals targeted the 67m platform extending over Pacific Beach. Since being opened in December 2015 the glass viewing area has been smashed four times.
"It's incredibly disappointing that when we spend ratepayers money on trying to make the city a better and more attractive place for locals and tourists alike, that some turkeys somehow seem to like to smash up the good work.
"It makes you reluctant to spend money on things that you think may be damaged."
Several homeless people used to sleep under the platform. If they still did, Mr Dalton did not believe they would be the culprits.
"It is their home, and therefore they're unlikely to set fire to it."
The port side of the platform had been scorched with black marks from the smoke.
Other landmarks along Marine Parade have been compromised by repeated vandalism - like the nearby Veronica Sunbay, which used to have windows to help create a windbreak so people could sit there in comfort.