A spokeswoman said workers were trying to tow the 366-metre CSCL Jupiter away but could not say when this would be completed, MANA correspondent reported.
"We're heading for low tide in the coming hours, that does not make things easier," the spokeswoman said.
Covering a space of 20,000 football fields, the port of Antwerp is the 15th largest container port in the world and handles 214 million tonnes of maritime freight each year.