"It's going to give us the peace of mind that we have good gear on the beach, if and when we need it," Mr Nielson said.
"Having good gear is vital in a lifeguard's role."
Mr Nielson said the new outboard motor would cost about $6000, while the defibrillator would be about $4000.
Auckland Airport spokesman Charles Spillane acknowledged that this time of year would be the busiest for lifeguard patrols around the country.
"The North Piha Lifeguard Service patrols an impressive expanse of coastline.
"With summer holidays on the way and Kiwis getting their togs out, we felt it was important to ensure the organisation was properly equipped for the vital role they play in keeping people safe."
The lifeguard service is one of 12 charities from around the country to receive the grant in the airport's annual Christmas giveaway.
The money is raised from donations from members of the travelling public who place unwanted currency into special globes, placed around the terminal, throughout the year.