Two young Indigenous people have been transferred from youth detention to an adult prison facility in Tasmania, with concerns raised by the state's Aboriginal legal service.

Confirmed by the Tasmanian Aboriginal Legal Service (TALS) on Monday, two Aboriginal and Torres Strait Islander young people were recently transferred from Northern Tasmania's Ashley Youth Detention Centre (AYDC) to the adult Tasmanian Prison Service.

TALS CEO Jake Smith said ahead of the transfer the organisation was was in contact with AYDC, the Tasmanian Prison Service, and the Commissioner for Children and Young People "with the early concerns that multiple transfers of youths might occur over the holiday period".

"Multiple transfers were being considered, including young people and those aged 18 years of age and over," Mr Smith said.

"Any transfer of a young person to an adult facility would have been completely unacceptable."

Mr Smith said TALS is concerned about the wellbeing of those who have been transferred at such short notice.

"The shift from a youth facility to an adult facility is a significant change and can have a considerable impact on the lives of those affected," he said.

"We are aware that cultural and safety plans were discussed in consultation with the the young people and their families, and our Aboriginal Wellbeing Team has made contact to provide support."

Ahead of the transfer, the Tasmanian Aboriginal Centre (TAC) said the action represented a serious breach of human rights and Australia's obligations to children.

Last week TAC CEO, Rebecca Digney, said she understood the decision to transfer the young people had been made without informing the young detainees or their families.

"These young people have the right to know what the State plans to do to them," Ms Digney said at the time.

"By failing to tell them or their families, the State has effectively denied these young the chance to seek legal advice or advocacy at the very moment they need it most.

"This is not a small procedural issue. It goes to the heart of fairness and due process. If young people are not told what decisions are being made about them, they cannot challenge those decisions or protect their rights."

Mr Smith said cultural and safety plans had since been discussed in consultation with the the young people and their families, with TALS' Aboriginal Wellbeing Team also making contact to provide support.

TALS operates the Aboriginal Wellbeing Program, which is funded by the Tasmanian Prison Service (TPS).

"Our Wellbeing team provides assistance to Aboriginal and Torres Strait Islander people while in TPS custody, including support for family connection, cultural needs, and other supports," Mr Smith said.

"Mob supporting mob is incredibly important."

Mr Smith said despite limited capacity, TALS will ensure the young people who have been transferred are supported.

"While our capacity is limited due to funding, with two team members supporting nearly 250 people, young people and those in custody for the first time are prioritised," he said.

"We will continue to support those who have been transferred from Ashley and monitor for any further discussions of transfers should they arise."

Responding to questions posed by National Indigenous Times, a Department for Education, Children and Young People (DECYP) spokesperson said for legal and security reasons the DECYP does not comment on individuals.

"A memorandum of understanding between the Department for Education, Children and Young People and the Department of Justice provides the requirements for how these transfers occur," the spokesperson said.

"In any transfer these arrangements are followed."