Mayor David Lisnard signed off on the ruling that "access to beaches and for swimming is banned to anyone who does not have (bathing apparel) which respects good customs and secularism," which is a founding principle of the French republic.
"Beachwear which ostentatiously diplays religious affiliation, when France and places of worship are currently the target of terrorist attacks, is liable to create risks of disrupting public order (crowds, scuffles etc) which it is necessary to prevent," it says.
Thierry Migoule, head of municipal services for the town, sought to clarify the ruling's intent.
"We are not talking about banning the wearing of religious symbols on the beach ... but ostentatious clothing which refers to an allegiance to terrorist movements which are at war with us," he said.
On July 14 the nearby Riviera city of Nice was the target of an attack claimed by the so-called Islamic State group which killed 85 people, when a truck ploughed into seafront crowds celebrating the French national holiday.
On July 26 a priest was killed in his church in northwestern France by two attackers who had proclaimed their allegiance to Islamic State.
Islamic dress is a hot-button issue in France, where the full-face veil is banned in public places. But there is no ban on wearing religious symbols or clothing.
Migoule said that no burqini had been seen on any beach in Cannes since the ruling was signed into force on July 28 by Lisnard, a member of the centre-right Les Republicains party.
Earlier this week a waterpark in nearby Marseille cancelled plans to host a private event for Muslim women wearing burqinis after they sparked outrage, including from politicians on both the right and left.
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