The ACT has recorded eight new COVID-19 cases in the past day, all of which are linked to existing infections.
More than a week into Canberra's lockdown, none of the new cases were infectious while they were in the community.
The ACT now has 102 active cases of the disease. Of these, 100 are linked to known cases or coronavirus exposure sites.
Chief Minister Andrew Barr said the city's restrictions appeared to be working, but warned of ongoing risks.
"The lockdown has significantly reduced the risk around exposure sites, but there will be some," he said.
Asked when the ACT might be able to emerge from its lockdown, Mr Barr said he would act with extreme caution.
"[It would require] day after day of zero cases, with people not infectious in the community," he said.
"Coming out early while there is still a risk of virus transmission in the community could see the whole thing start again.
"We now have the kitchen sink being thrown at things in New South Wales — it's a demonstration that you need to take things seriously from the outset."
Health Minister Rachel Stephen-Smith said having all new cases in quarantine while infectious was positive.
However, she urged Canberrans not to get "overexcited" by one day's news.
"It is likely that we will see cases over the next couple of days that had some period where they were infectious in the community," she said.
"This is contact-tracing working, and this is isolation and quarantine working."
Ms Stephen-Smith said two of Canberra's COVID-19 cases were in hospital, but added that they had not been admitted because of the virus.
Three cases in surrounding areas of NSW originated in the ACT.
Children's vaccination planning under way
The ACT outbreak continues to spread mostly among younger Canberrans, particularly school students.
About 40 per cent of known cases are people aged 17 or younger, and 46 per cent are aged 18 to 44.
However, Chief Health Officer Kerryn Coleman said authorities were detecting more cases among older people.
"We have got a slightly increased proportion now who are above 45 years of age, and that is because we are starting to see household contacts of those students as our new cases coming forward," she said.
Mr Barr said his government planned to vaccinate Canberra children as soon as possible.
He said any national vaccination rate goals should include younger people, not only Australians aged 16 years and older.
"But this depends, as always, on vaccine supply."
A total of 4,683 coronavirus tests were carried out across Canberra on Friday.
Wait times at testing sites have shortened dramatically after extremely long queues earlier this week.
This year's Floriade and Nightfest cancelled
The twin spring festivals of Floriade and Nightfest, two of Canberra's biggest annual tourist events, have been cancelled.
The ACT government said on Saturday that the ongoing outbreaks in Canberra and the surrounding region meant it was impossible to manage the events safely.
Flower bulbs will bloom in Commonwealth Park, Floriade's traditional home, but the government says it will discourage crowds from attending.
The events were scheduled to begin in three weeks' time.
The government said it would instead relocate the planter boxes and pots that were to feature in Floriade to Canberra's suburbs, as it did last year.
Meanwhile, Mr Barr praised Canberrans' response to the latest outbreak, saying residents were behaving exceptionally.
"ACT Policing advises that compliance continues to be excellent," he said.
Police stopped almost 800 motor vehicles on Friday, and issued 11 directions to people to leave the ACT.
