Emergency services were called to the crash on Otaika Valley Road at 12.14am and on arrival saw the Holden Commodore station wagon on fire.
NorthlandSerious Crash Unit analyst Warren Bunn said police believed the 86-year-old woman and her 64-year-old son were heading north when their vehicle left the road, went down a bank, hit a tree and caught fire.
Fire and Emergency Northern shift manager Paul Radden confirmed firefighters had been sent to the crash from Auckland and Whangārei.
Bunn said despite best efforts, firefighters and ambulance staff on site were unable to save the pair. They died at the scene.
The latest fatal crash has taken Northland’s road toll to seven deaths this year - two more than this time last year.
Avneesh Vincent is the crime and emergency services reporter at the Advocate. He was previously at the Gisborne Herald as the arts and environment reporter and is passionate about covering stories that can make a difference. He joined NZME in July 2023.