Firefighters continue to work on the perimeter of the Great Barrier Island fire which flared up overnight but stayed within containment lines.
The blaze has burned across 112ha, with ground crew and thermal imagery used to identify hotspots.
Additional fire crews have been recruited from Rotorua and Nelson to relieve exhausted Auckland crews.
"The fire is contained but not out and there's still a lot of work to be done," said National Rural Fire Officer Murray Dudfield.
Weather conditions are favourable for this ground-based operation today, but increased winds are expected tomorrow and on Saturday making further work to strengthen containment lines a top priority, said an Auckland Council statement.