Australian Beach Flags Champion Chanel Hickman (Mairangi Bay) then took gold in the Women's Beach Flags, her first medal for the competition.
Teammate Paul Cracroft-Wilson followed up taking silver in the Men's Beach Flags.
McKenzie then stepped in to win another silver for the team in the Iron Woman with Midway's Cory Taylor also taking silver in the Iron Man.
The Women's Ocean Relay team of Natalie Peat (Papamoa), Natasha Hind (Lyall Bay), McKenzie and Hickman then claimed the day's only bronze medal.
In true world champion style, the team finished off the day as they started - on a high note, winning gold for the Men's Taplin Team of Taylor, McMillan, Cracroft-Wilson and Beattie.
Surf Life Saving New Zealand chairman Geoff Hamilton was understandably thrilled with the performance. "We look forward to rewriting the record books on this outstanding performance and to welcoming them all home in due course as world champions," he said.
The New Zealand Youth Team also had a successful day in the pool on their final day of competition, picking up another two medals to add to a successful campaign.
Papamoa's Ben Johnston and Sumner's Brittany Tucker each picked up bronze medals in the men's and women's 50m Manikin Carry. Ben finished in a time of 31.96 with Germany's Joshua Perling in first place in a time of 31.28 and Spain's Domingo Togores in 31.88. Brittany clocked 37.77 behind Australia's Prue Davies in a time of 37.32 and Germany's Annalena Geyer in third with a time of 37.46.
Black Fins, day five:
1st: Chanel Hickman, Women's Beach Flags
1st: Cory Taylor, Chris Dawson, Max Beattie & Paul Cracroft-Wilson, Men's Taplin Team
2nd: Paul Cracroft-Wilson, Men's Beach Flags
2nd: Danielle McKenzie, Women's Ski Race
2nd: Max Beattie, Men's Board Race
2nd: Andrew McMillan, Men's Surf Race
2nd: Danielle McKenzie, Iron Woman
2nd: Cory Taylor, Ironman
3rd: Natalie Peat, Chanel Hickman, Natasha Hind, Danielle McKenzie, Women's Ocean Relay
4th: Natasha Hind, Women's Surf Race
4th: Chris Dawson, Men's Surf Race
5th: Max Beattie, Ironman
5th: Natalie Peat, Women's Surf Race
6th: Cory Taylor, Men's Board Race
8th: Natalie Peat, Women's Ski Race
8th: Natalie Peat, Iron Women
New Zealand Youth Team: Day Four results
3rd: Ben Johnston, 50m Manikin Carry (31.96)
3rd: Brittany Tucker, 50m Manikin Carry (37.77)
4th: Jacob Hales, 100m Manikin Carry with Fins (49.56)
5th: Andrew Trembath, 100m Manikin Carry with Fins (49.59)
5th: Andrew Trembath, 100m Rescue Medley (1.06.82)
7th: Brittany Tucker, 100m Rescue Medley (1.07.50)
8th: Jacob Hales, 100m Rescue Medley (34.57)
Youth Team final points tally: Australia: 1065; NZ: 787; Germany: 600.