All holidaymakers arriving in the country from Great Britain will have to follow the new rules.
The UK Foreign Office has updated its travel advice to reflect the change in policy.
The advice of the site gov.uk now reads as follows: “The French Minister of Health has announced that wearing a mask in closed public spaces will be compulsory from Monday 20 July.
“This includes shops, indoor markets, banks and other establishments open to the public. ”
He added that other details should be published soon.
In France, the authorities made it compulsory for people aged 11 and over to wear masks from May 11.
Masks are also mandatory in taxis and private rental vehicles without a Plexiglas screen.
Health officials have said fines will be imposed on those who fail to comply.
In Britain, people will have to wear a mask in shops and supermarkets from July 24, as well as on public transport and when visiting hospitals.
Since July 4, France has been exempt from the general advice of the Ministry of Foreign Affairs against all non-essential international travel, along with more than 60 other countries.