Police area commander Insp Kelvin Lloyd said tidal forecasts showed the weather over the coming days was going to be calm enough for the dive squad to enter the water and attach floating equipment to the vehicle.
The equipment is used to float the wreckage so police can tow it out from the rocks and recover it from the water.
The Police National Dive Team would be flying tomorrow to Invercargill where they would formulate a plan.
"The car, and what may be inside, remains a crucial part to our investigation, and we will be taking as much care as possible to recover it. This means it will most likely take our expert team a considerable amount of time to recover it safely.''
Police have been searching for Mike and his step-father, John Beckenridge, since they went missing on March 13.
A lot of information has been received from members of the public around the country in regards to potential sightings, however none of these have resulted in further lines of inquiries and the last confirmed sighting still remains the one on March 16.
While all the evidence police had pointed the pair being in the vehicle when it went over the cliff, police continued to be treated it as an active missing person investigation until they could confirm otherwise, Insp Lloyd said.
