Danish authorities plan to tow the carcass of the humpback whale known as "Timmy" from the holiday island of Anholt to a port in Jutland.
The whale is lying in shallow water on a busy beach where it could cause a serious disturbance to residents and tourists, the Danish environmental agency said on Thursday.
Authorities said they would attempt to tow the whale - which was previously the subjects of weeks of rescue efforts after becoming stranded off Germany's Baltic coast - to the mainland port of Grenaa on Thursday, with the operation likely to take the entire day.
A post-mortem examination could then take place on Friday.
It would be easier to work on the carcass in the port, according to the agency.
"In Grenaa, scientists and veterinarians will carry out the examinations and take samples, as has been done in previous strandings of larger whales," the environmental agency said in a statement.
The press will be permitted to observe the work on the animal from behind barriers, as "machinery and sharp equipment" would be in use, it added. Should it prove impossible to move the whale to the port, authorities plan to examine it on Anholt.
The Danish environmental agency had previously warned the public not to approach the animal due to the risk of infection. The carcass could also explode, with footage from livestream provider News5 showing that it has become extremely bloated with decomposition gases.
