The government is expecting severe disruption in the Kent area while other ports facing France will also be impacted due to the travel ban.
Prime Minister Boris Johnson is holding a special Cobra meeting to deal with the chaos.
A Government spokesperson said: “We are expecting significant disruption in Kent following the announcement by the French Government that, from 23.00 on Sunday 20 December, it will not accept any passengers from the UK for the next 48 hours.
“As a result we are urging everybody – including all hauliers – to avoid travelling to Kent ports until further notice.
“We are working closely with Kent Resilience Forum, Kent Council and Highways England to ensure contingency measures are urgently put in place to manage disruption, and the Prime Minister will chair a COBR meeting tomorrow to discuss the situation.”