Police believed they knew who the person was, but could not say more until the body was formally identified, a process that could take some time.
Fouhy said the vehicle was engulfed in flames, which had begun spreading into nearby vegetation, when firefighters arrived about 15 minutes after the alarm was raised.
Chief Fire Officer Les Wasson said the blaze had spread into about 100 square metres of vegetation by the time fire crews arrived.
''It had the potential go up the hill towards houses. It was lucky we'd had a bit of rain,'' he added.
Meanwhile Fouhy was unable to say how long the scene examination would take.
''It depends what we find inside and around the vehicle,'' he said.
A post-mortem would be conducted to establish the cause of death.
Wharau Bay is one of the closest beaches to Kerikeri's town centre, making it a popular spot for families and fishers. Access to the beach is closed while the investigation is underway.
A gravel parking area at the road end is believed to be covered by high-quality CCTV from a private home.