Will the internet be fast during Venice Carnival 2026?

You should set realistic expectations. During peak Carnival events, especially around St. Mark's Square or the Grand Canal parades, local mobile networks (like TIM, Vodafone, WindTre) will be under immense strain from hundreds of thousands of users. While an eSIM connects to these top-tier networks, you may experience slower speeds for data-heavy tasks like video streaming. However, it will be far more reliable for essentials like messaging, maps, and ride-sharing than overloaded public Wi-Fi.