Prime Minister Jacinda Ardern says Cabinet will reconsider alert level 2 settings again on 8 June and no later than 22 June will consider a move to alert level 1.

Ardern revealed the plan - along with plans to allow gathering of up to 100 people from midday on Friday - in her weekly post-Cabinet media briefing.

Director-General of Health Ashley Bloomfield also attended the briefing and says it's possible because of the strategy of going hard and going early to combat the spread of the virus.

"Our lockdown and the way people supported that through alert levels 4 and 3 has paid huge dividends here so we felt not only that we should move to 100, but we should then spend two full infection periods in alert level 2 then actively consider moving to alert level 1."

Read back through May 25's COVID-19 developments: