Coronet Peak Ski Area manager Hamish McCrostie confirmed the Coronet Express, Meadows Express and two main snow carpets would be open at 9am.
Mr McCrostie said the first four seats on the Coronet Express chairlift were usually fiercely sought after.
"We get people camping out here overnight," Mr McCrostie said.
Aside from the celebratory bubbles, and T-shirts for the first chair rides, Coronet is also hosting the Cure Kids Ticket to Hope event tomorrow.
The news the mountain could open on its intended date was "fantastic" and had been made possible by the field's 116 snow guns, Mr McCrostie said.
"We have made a huge investment to be open this time of year and it really pays off for us and for the community, because we certainly wouldn't be open without snow making," he said yesterday.
Last Sunday, the slopes were looking bare and temperatures were too high for snow making.
However, this was not unusual for Coronet Peak, Mr McCrostie said.
"It's typical of late May and early June, but now that June is here we are likely to see more consistently cold temperatures."
The plan was to "just keep making snow as long as it's cold enough" for opening and the days after it, he said.
