After the Council of State overturned the Villeneuve-Loubet ban last week, human rights groups said they would challenge similar bans issued in around 30 French cities, resorts and communes.
Cannes was the first in a series of Riviera towns to ban the full-body swimsuits, worn by some Muslim women, on its beaches.
Rulings over the bans have been closely watched in France and around the world, after photos of armed police surrounding a Muslim woman as she removed her top on a beach in Nice sparked outrage.
Lawyers for a human rights group and a Muslim collective challenged the Villeneuve-Loubet ban at the top court, saying mayors had overstepped their powers by telling women what to wear on beaches.
Mayors had previously cited a number of reasons for the bans. These included security after a string of terror attacks in the country and elsewhere in Europe; risk to public order; and France’s rules on secularism in public.
The Council of State ruled: “The emotion and concerns arising from the terrorist attacks, notably the one perpetrated in Nice on July 14, cannot suffice to justify in law the contested prohibition measure.”
Cannes mayor David Lisnard, said earlier this month the ban was being introduced in the town to prohibit “beachwear ostentatiously showing a religious affiliation while France and places of religious significance are the target of terror attacks”.
A “burkini ban” issued in Cannes has been overturned by a French court on the basis that it is a violation of fundamental liberties.