There will be a "colourful fiesta" of flags and fanfare as athletes, VIPs and celebrity guests greet thousands of spectators at Earnslaw Park on Friday, with skydivers dropping to the shore of Lake Wakatipu.
Winter Games chief executive Arthur Klap said the skydivers would drop at 4pm as a specially composed fanfare announced the arrival of flagbearers - Lakes area children representing each competing nation - via jet-boat.
With everyone in position, a traditional powhiri [welcome] by members of Kai Tahu will take place, with one of the athletes representing the visitors accepting the challenge laid down by the wero ki nga manuhiri [warriors].
The Governor-General of New Zealand Sir Anand Satyanand will then formally declare the games open before a fire show leads the procession of VIPs inside for an official reception.
Spectators will be able to keep warm with plenty of food and drink as live bands - the GCs and the Lynch Mob - play into the night.
Earlier in the day another local band, Mutz Nutz, will play from 1pm, followed by a prize giveaway and more music from the Cartel.
Mr Klap said the opening ceremony's mix of formal procedures and fun was in keeping with the atmosphere the games were trying to create.
"With more than 800 athletes from 32 countries here in Otago, we're sure to see some serious competition hosted in a typical Kiwi carnival atmosphere.
"We're honoured the Governor-General will formally open the first ever 100% Pure New Zealand Winter Games - a recognition of its international importance for the country - and we'd like as many people as possible to come down to Earnslaw Park to welcome the athletes and join the fun."
The Winter Games NZ will be held at Coronet Peak, the Remarkables, Cardrona Alpine Resort, Snow Farm, Naseby and Dunedin from August 21 to 30.
Disciplines include alpine skiing, free-skiing, cross-country skiing, snowboarding, curling, ice skating and adaptive snow sports, along with the demonstration sports of winter triathlon and natural luge.