South Australia will move out of lockdown on Tuesday night if no new COVID-19 "unlinked cases" emerge before then, Premier Steven Marshall has announced.
The decision to end the statewide seven-day lockdown came after "no serious escalation" with the Modbury cluster in recent days.
One new case linked to the cluster was announced on Monday, an 87-year-old man who was in quarantine, who was at the Tenafeate Creek Winery.
There are 19 cases overall linked to the cluster.
Mr Marshall said the stay-at-home order would end at midnight on Tuesday and the state would ease restrictions.
There will be a further week of restrictions put in place across the South Australia, including:
Mr Marshall announced that schools would reopen on Wednesday, while there will be more details on sporting activity provided on Tuesday.
He said he was proud of the way South Australians adhered to restrictions put in place over the past week.
"There will be a gradual reduction in restrictions in line with the still heightened risk we have in South Australia," he said.
"Thanks to South Australia for the extraordinary efforts of every single person in this state - I'm very grateful.
"We have put ourselves in a very good situation."
Mr Marshall said it was "difficult to say" where the state would be in a week's time in regards to the easing of the restrictions to come in from midnight on Tuesday.
The Premier said they had decided to include regional areas in the lockdown and not ease restrictions outside of Adelaide sooner as a precaution.
He said the case at Westminster School, where there are boarding students, and cases in Mildura across the border from the Riverland, were of concern.
"The problem is we just don't know it's not in other parts of our state," he said.
"We don't want to take chances, we have one shot to make it right."
Chief public health officer Professor Nicola Spurrier has urged people to get tested if they have any symptoms.
She said of those positive cases in the Modbury cluster, 12 people had not been vaccinated - including four younger people who were not eligible - six people had one vaccine dose and one was unknown.
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