Ms Joyce-Paki said investigations into how the blaze was sparked had started yesterday.
"A popular walking track passes along the coast there and campers were in the area. It was actually a surfer who spotted the fire and raised the alarm."
She said the kauri tree Tane Mahuta, Waipoua's most famous resident, was not in any threat from the blaze.
The winds were not strong and it was hoped the fire would be extinguished today.
Two helicopters were still on standby yesterday.
Meanwhile, Ms Joyce-Paki said, a fire that started in Kelly's Bay, about 50km southwest of Dargaville on Pouto Peninsula, on January 22 continued to burn as it had become deep seated in peat.
There were still a dozen firefighters on site working on hot spots.
Dargaville police are still investigating the cause of the Pouto fire that burned about 200ha of forest and is costing tens of thousands of dollars to fight, including $86,000 on helicopters alone.
Three helicopters and 80 ground crew battled for two days to control the fire in 50ha of pine trees and another 150ha of native scrub and wetland in the Punahaere Creek reserve, managed by the Department of Conservation.