A jubilant Red Beach women's crew celebrated a slick upset win in their final, meanwhile, after a poor start by defending national champions Mairangi Bay. Unbeaten during their heats and semifinals, Mairangi Bay looked to continue their recent dominance but lost a rower overboard in the windy chop and never recovered.
Red Beach, with Monty McGougan sweeping and Ashleigh Jenkins, Lorraine Murray, Madison Smith and Zita Talaic rowing, took full advantage, cleaning out to beat Orewa and Mount Maunganui into the minor placings.
"We've put in a whole lot of work to get this result and we're ecstatic to have nailed it in such testing conditions, against such tough competition," crew captain and second bow Talaic said. "This has given us a huge shot of confidence and means we can really focus on giving that New Zealand selection a serious nudge."
Titahi Bay and Omanu were fourth and fifth respectively, with Mairangi Bay limping home last.
Bourneville capped a dream day by winning the treble, sweeping both his under-23 and under-19 men's crews to victory in their divisions and picking up second in the under-21 women for good measure, behind the strong Rarangi crew from Blenheim.
Hosts Paekakariki, swept by Richard Whinham, grabbed the final title of the day in the under-19 women's division, heading home Titahi Bay and Rarangi.
The next round of the series is in Whangamata on January 2. The revamped four-round series will finish with the North Island championships at Waihi Beach in February, which will also feature the trans-Tasman test.