Rough seas and high winds have stopped experts from being able to make the Costa Concordia cruise ship safe.
The cruise ship ran aground off the coast of Italy in January, and at least 32 people died.
Protective oil barriers put around the ship have stopped working properly, which means oil has started leaking out of it.
Leaking oil can cause massive damage to wildlife in the sea.
It may also wash up on the beaches around the bay and the island of Giglio.
Around 4,200 people were on board when the ship turned on its side.
The captain of the ship is still under arrest while the Italian authorities investigate what happened.