A Coastguard Air Patrol aircraft and LandSAR volunteers on quad bikes failed to find any trace of his body last night.
A memorial for Mr Boraman was held yesterday at the Papakaio Community Centre in Otago.
A death notice published last week said that Mr Boraman - a Russian orphan born Victor Sergeyevicvh Vasiliyer who was brought to New Zealand by his new parents Ted and Dixie Boraman as a six-year-old - had been "tragically lost at sea''.
Mr Boraman was originally from Oamaru but moved to Ashburton earlier this year to work on a dairy farm.
According to his mum her son's dog had run into the lagoon.
His friends grabbed it and when they turned around a wave had come in from behind Mr Boraman and knocked him off his feet.
Police said Mr Boraman did everything right.
It was understood he took his waders off so that he could float as attempts were made to rescue him.