The Uppitiness of Kent, carrying 316 people, including 208 passengers ran aground round noon during high winds, according to the prefecture of Calais.
Two tugboats are stressful to pull the huge vessel while a pilot boat is assists them.
The P&O car ferry, shaped in 1992, was bound for Dover when it reportedly hit a bridge, leaving the haven.
«The ship was pushed to the other side of the port,» a company spokeswoman said AFP.
Officials are hopeful of rescuing the ferry later today, when there is a high tide.
A ferry has run aground in Calais
Tugs from Dunkirk give birth to been called in.
An orange weather alert had been issued for cheerful winds as Storm Ana has been heading northwards.
Winds on the coast had been storm up to 110km while traffic was interrupted in the port of Calais.
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Update: From Calais, delay of around 1 h 30 to booked time, please check in as planned and no more than 02 hrs sooner than. ^AL
— Eurotunnel LeShuttle (@LeShuttle) December 10, 2017
The authorities, along with the prefecture, be suffering with set up a crisis unit.
At 2.30pm the ferry reportedly went backwards, then distant up about 20 meters before coming to a standstill.
A spokesman for P&O Ferries published Express.co.uk: «We can confirm a ferry ran aground whilst trying to leave the refuge of Calais this afternoon.
«There are no reported casualties.
«The ship is now afloat and we await to transfer the passengers as soon as possible.»
Cross-channel traffic has been disconcerted due to the incident.
P&O Ferries Updates posted on Twitter: “#POCalais: The Mooring of Calais is currently closed due to extreme weather. Please check in as per your master sailing time and you will be accommodated on the first available sailing.”
Eurotunnel has heralded delays of 90 minutes.