No, swimming in the canals of Venice is strictly forbidden and carries heavy penalties in 2026. The city of Venice enforces a "zero tolerance" policy to protect its delicate historical heritage and maintain public order. If caught diving into or swimming in any canal, including the Grand Canal, tourists face an immediate administrative fine ranging from €350 to €500. Beyond the fine, offenders are typically issued a DASPO (urban banning order), which expels them from the historic center of the city for a minimum of 48 hours. Aside from the legal risks, swimming in the canals is a significant health hazard; the water contains high levels of bacteria from the city's ancient sewage system and industrial runoff, not to mention the dangerous traffic from high-speed water taxis, vaporettos, and gondolas. If you are looking to cool off, locals recommend taking the water bus to the Lido di Venezia, which offers long stretches of sandy beaches and clean Adriatic seawater where swimming is perfectly legal and much safer.