Ski Area manager Hamish McCrostie said the record warm May temperatures had caused the delay, as warm weather meant snow-making was impossible.
NZSki did not announce a new opening date yesterday.
"Obviously, it's hugely disappointing for the management and staff of Coronet Peak that we can't get the season under way this Saturday, but we will open on the very first day we possibly can. Our mountain staff are all on board this week training and our snow-making team is on 24-hour standby for temperatures to drop."
Coronet Peak needs at least 72 hours of continuous cold air temperatures and low humidity levels to make enough snow to open.
The MetService predicted a -2degC overnight low on the mountain last night, with morning mists or fog today and a minimum of -1degC, with more fog predicted tomorrow morning and a low of 0degC.
