He said the dive squad were "going through the motions" on the lake today.
No details have been released by police, except that it was an adult.
Police would also not elaborate on why no details had been released to the public, including where specifically on the lake the incident happened.
Last month, Auckland man Colin McCormick drowned after he jumped into Lake Rotoiti near Otaramarae to retrieve his hat, which had blown off as he was heading to Manupirua Springs hot pools with his partner and 9-year-old son.
Described as a strong swimmer, Mr McCormick was wearing a lifejacket but it fell off after he dived in to the lake.
His partner threw him a rope, but he could not reach it after the boat was blown away from him by strong winds.
Police found his body eight days later.