On returning to shore, Kate continued care of all four patients who had inhaled water and were in shock.
The ambulance arrived within five minutes and transported two of the patients to hospital for observation.
Each month, Surf Life Saving New Zealand selects a winning rescue from each region as well as an overall national winner for the title of BP Rescue of the Month. Ms O'Malley won the Central Region BP Rescue of the Month award for December as well as being the overall national winner.
Surf Life Saving New Zealand chairman Geoff Hamilton says the extraordinary efforts shown by the Lifeguards was outstanding.
"Admiration of the skill and professionalism shown by those involved in the incident is testament to qualities valued by Surf Life Saving New Zealand and BP," he said.
The club receives a $500 fuel voucher from BP to help with the financial costs of keeping communities safe in the water.
"BP's partnership with Surf Life Saving New Zealand is heading towards 50 years and their constant delivery of excellence has been a factor in all of those years- it is truly inspirational," BP managing director Matt Elliott said.
For more information about BP Rescue of the Month visit www.surflifesaving.org.nz/lifeguarding/rescue-of-the-month