The national event, held on the Dunedin course from the Kitchener St venue for the fifth consecutive year, also doubled as the Oceania championship in the slalom discipline, meaning there was a lot for competitors to contemplate as they waited for wind to rise above 13 knots over the course.
Race officer Jodie Taylor shared the disappointment of the competitors, many of whom had travelled from Auckland and Australia to compete.
"The wind throughout the country has been so up and down this season," Taylor said.
"The only good thing is that we were fortunate to get in two days of racing where 18 rounds were completed, giving us a result."
When racing was finally abandoned late on Saturday afternoon, results hinged on the 18 rounds that were possible on Wednesday and Thursday.
Dunedin's Gareth Wood held a clear six-point advantage over James Dinnis (Taranaki) and Rowan Law (Perth), to claim the national title, but as Wood was not racing the Formula 42 board, he did not qualify for the Oceania title.
That title went to Law, from Paul Vliestra (Dunedin), second, and Terry Beentjes (Christchurch), third.
In the women's event, Annie Crombie (Christchurch) and Sue Bradley (Queenstown) were tied on 16.75 points each at the finish of competition on Thursday and the titles were decided by count back, and neither could be separated until Crombie's final ride on Thursday was taken into account, where she gained a .07 advantage over Bradley, and won her fourth national windsurfing slalom title.
Crombie (43) cut her teeth in windsurfing 20 years ago on Lake Aviemore, swapping her North Otago netball and basketball representative kit for one more aquatic.
Carey Lawrence (Auckland) at just 16 years of age, won a highly competitive under-20 section, holding out Dan Meechan (Dunedin, 19), who finished second and Tom McGregor (Christchurch, 15) and Harry Reed (Auckland, 19), who tied for third.
