The Hukarere College teacher re-entered the rip to rescue the other two teens, before caring for all four swimmers who had inhaled sea water and were in shock. Two of the survivors were later transported to hospital.
The triathlete and Harriers runner also won the outstanding beach athlete of the year and open ski champ at this year's awards.
Ms O'Malley said her club was always in need of more athletes willing to patrol the beach.
"The more people get behind the movement in surf lifesaving, the more we can help the public and the community." Ms O'Malley was also named the national winner for rescue of the month, and awarded the Central Region BP Rescue of the Month award for December.