Today's search effort has been hampered by high winds gusting between 80-100kmh.
Sgt Aaron Nicholson, of Wanaka, said the searchers felt they had done as much as they could today and now needed specialist help from police and Navy divers.
Mr Saxton (31) went missing with his helicopter on Saturday evening during a flight between Haast and Wanaka Airport.
Wreckage from the helicopter has been found in the lake and on the shores near Mou Waho Island, while searchers have also identified an oil slick where the helicopter is believed to have hit the water in a hard impact accident.
Nothing further has been found today. The dive teams, expected to arrive in Wanaka at 6pm, will bring a remote-operated vehicle with them.
It is not known whether they will start searching this evening or wait until tomorrow to begin.
Grave concerns are held for Mr Saxton, who has not been found despite extensive shoreline, aerial and boat searches over the weekend.
Rescue Coordination Centre New Zealand spokesman Ross Henderson said this morning the RCC had suspended the search and handed over to Wanaka police and local Land Search and Rescue (LandSar) volunteers.
Det Sgt Derek Shaw of Central Otago CIB said yesterday he did not want to understate how difficult a salvage attempt would be because the lake is about 100m deep where the helicopter is thought to have gone down.
Experts were being consulted and there was no way recreational divers would be able to assist, he said.
unday, with a 1.5m swell and an 80kmh wind at the search site north of Mou Waho Island.
Two Civil Aviation Authority investigators have been in Wanaka and were working with the police on plans to salvage the helicopter.
CAA communications officer Bill Sommer said today getting the wreckage would be very important in determining the cause of the accident.
No preliminary understanding of what might have happened had been reached yet, Mr Sommer said.
