"We pulled him sometimes and he followed us sometimes. We were just encouraging him. He would get hit by waves and go under and we had to get him up."
Sergio swam ahead to raise the alarm on shore and then swam back out to help get the man to land.
"We slowly made our way back in to shore and he collapsed on the ground. Then we rolled him onto his side," he said.
Once in the recovery position the man began, vomiting, went into shock and lost consciousness.
Sergio's mum Vivian Schuler called the ambulance and attended to the man until help arrived.
Through it all the brave rescuers were never scared or worried about their own safety.
Waihi paramedic Pauline Davison said the rescuers did everything right while they waited for help.
"They had done an exceptional job. They had put him in the recovery position."
The man was taken to Tauranga Hospital. He was discharged overnight and texted Mrs Schuler to give his thanks and arrange to meet the boys.