''One of the things we do know is that the snow will come,'' Legnavsky said.
Cardrona communications media executive Jen Houltham said temperatures were looking much colder from early next week.
''We should be able to get a decent amount of snowmaking done to open for skiing and snowboarding next Friday,'' Houltham said.
Treble Cone near Wanaka, is scheduled to open on June 25.
NZSki.com fields are also scheduled to open soon.
Mt Hutt, in Canterbury, opens from Friday; Coronet Peak, at Queenstown, from June 19; and The Remarkables, near Queenstown, from June 26.
Coronet Peak has received 22cm of snow this season, but none in the past week. It has a 0cm snow base, according to its website, and is waiting for colder temperatures next week so snowmaking can begin.
The Remarkables has a 10-20cm snow base, but has not had any snow in the past week and is also waiting for good snowmaking conditions, according to its website.
Mt Hutt, however, has received 70cm in the past week and has a snow base of between 30cm to 80cm.