Waihi police are appealing for help trying to locate 79-year-old Alison Philip.
She was last seen at her Whangamata home on Monday.
Ms Philip's silver Honda Accord vehicle was located at Anzac Bay in Waihi Beach at 6.30am on Tuesday morning.
The Tauranga-based TrustPower TECT rescue helicopter was called to help search last night.
Pilot Liam Brettkelly said the helicopter was called to search the rugged coastline at Bowentown heads and and some of the coastline toward Waihi Beach, Matakana Island and inner harbour shoreline near Athenree.
He said nothing was found. It is unsure if the rescue helicopter is needed to help search
Waikato search and rescue co-ordinator, Constable Dave Pitchford Mrs Philip has no known medical conditions or issues of concern that could cause her to get into difficulty.
"Her disappearance at this stage is unexplained,'' he said.
"We are asking anyone who may have seen her to contact us.''
Newmont Waihi Gold's Mine Rescue squad is today out helping with the search for the Whangamata woman.
The two teams are searching the cliffs and rocks in the Anzac Bay area.
They were on standby last night but started their search at 8am this morning.
A neighbour of Mrs Philip described her as reclusive.
"She and her husband, who died about two years ago, used to come and go every so often in their car but they never waved or smiled if I was in the garden. They seldom had visitors and when they were home doors and windows were kept closed. I never heard music or any other sound coming from the house, they lived very quietly.''
If anyone has any information regarding her whereabouts or any activity around her vehicle in Anzac Bay please contact Sergeant Fraser of the Waihi Police urgently on 07-8638179.