Cases are up by 412 from 514 reported on Monday.

The new COVID-19 cases bring the active total to 2789.

Meanwhile, the testing clinic at Holt has closed for Tuesday due to a blackout.

There are 13 people in hospital because of COVID, with one in intensive care, and one on ventilation.

On Monday, Health Minister Rachel Stephen-Smith said the hospitals were preparing for the worst-case scenario, but so far the worst predictions had not eventuated.

"The team is working on the basis of a worst-case scenario of seeing a few dozen people potentially in hospital by late this week, early next week. So they're doing the planning around what that might look like," Ms Stephen-Smith said.

"We know that's not entirely unrealistic, but we're also hoping our very high vaccination rates here in the ACT will keep those numbers of people needing to be hospitalised - and particularly that number of people needing intensive care - as low as possible."

There were 3485 negative tests received in the 24 hours to 9am Tuesday.

Meantime, the percentage of the eligible population who are now fully vaccinated remains at 98.5 per cent.

MORE COVID-19 NEWS:

NSW has recorded 20,794 COVID-19 cases as hospitalisations increase.

The new cases were diagnosed from 96,765 tests undertaken in the 24-hours to 8pm on Monday.

There are 1204 patients in hospital, 25 of them in ICU.

Victoria has recorded another two deaths from COVID-19 and 14,020 new cases.

There are 48,297 active coronavirus cases in the state and 516 patients in hospital, the seven-day average is 464.

A total of 56 people in intensive care are actively infected and 52 have been cleared, with 24 of those on a ventilator.

Tasmania has reported 702 new COVID-19 cases, marking another record day for fresh infections.

Active infections have now risen to 2244 cases.

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