The two largest clusters are the Birkdale Social Network cluster associated with Case A, a Devonport man whose positive test sent the country into a level 4 lockdown.
New Zealanders will find out the nature and duration of the lockdown at a post-Cabinet announcement on Monday at 4pm.
All of New Zealand, bar Northland and Auckland, is due to move from level 4 – the strongest restrictions – to level 3 at midnight on Tuesday, but it is not yet known how long for.
Auckland and Northland were likely to stay at level 4 for another two weeks, Prime Minister Jacinda Ardern has previously said.