States and territories are issuing quarantine and self-isolation orders for travellers from South Australia today, as an outbreak of coronavirus cases Adelaide's northern suburbs grows.

Seventeen cases have now been linked to a cluster in Adelaide's northern suburbs.

It's forced the closure of a supermarket, two schools and a fast food restaurant, as the states health authorities scramble to contact trace and contain the outbreak.

Queensland, Victoria, Tasmania, the Northern Territory and Western Australia have announced specific measures for people arriving from SA, while New South Wales is sticking with no new border restrictions.

Return to this page for updates through the day.

Queensland

Queensland will declare Adelaide a COVID-19 hotspot, taking effect from 11:59pm tonight.

Anyone who arrives in Queensland after that time will have to go into hotel quarantine.

Anyone who has been in Adelaide since Monday last week, and is either already in Queensland or arrives in the Sunshine State before 11:59pm tonight is being asked to self-isolate.

Those people will need to get tested for COVID-19, whether or not they have symptoms.

Victoria

Victoria has declared Adelaide a COVID-19 hotspot.

Premier Daniel Andrews said anyone arriving from South Australia at Melbourne airport will be interviewed, and may be required to undergo a rapid test.

He said state health authorities will have more details later in the day.

He also said Victoria will be ready to offer any assistance to SA.

Victoria today recorded its 17th straight day with no new coronavirus cases or deaths.

Tasmania

Anyone currently in Tasmania, who has been in South Australia since last Monday, has been asked to self-isolate.

Anyone who arrives in Tasmania from SA, from today, will be required to quarantine.

Tasmania's Public Health Service also said those who have recently been in South Australia should be alert for COVID-19 symptoms.

People with symptoms, including mild symptoms, should seek testing through the Public Health Hotline on 1800 671 738.

A further announcement will be made later today.

Northern Territory

The Northern Territory Chief Minister announced all arrivals from South Australia will have to undergo supervised quarantine.

The declaration of South Australia as a hotspot for the purposes of travel to the NT will take effect immediately.

People who arrive in the NT will have the choice to return to South Australia immediately instead of undergoing quarantine.

Anyone who arrives today or tomorrow will not have to pay the $2,500 fee to undertake quarantine.

Two planes are due to arrive in Darwin from Adelaide today.

Western Australia

Anyone who has arrived at Perth Airport from South Australia from yesterday is being been tested for COVID-19, either on arrival or within 24 hours of arrival and told to self-quarantine for 14 days.

These arrivals will also be required to be tested on day 11 of their self-quarantine.

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This includes passengers from a Qantas flight from Adelaide to Perth who flew in on Sunday.

People who entered the state by plane were given the option of flying back to Adelaide on Monday after being told about the changes on arrival.

Passengers due to arrive on a flight later on Sunday were told about the new requirements and given the option to disembark.

New South Wales

New South Wales is so far keeping its border open, with no required quarantine, for travellers coming from South Australia.

"Our health authorities are confident the South Australian Government is on top of it," NSW Premier Gladys Berejiklian said.

"I'm not suggesting it's not concerning — it is."