The 2026 Formula 1 H2O season opened in Cagliari at Lake Su-Siccu, marking the event's return to Sardinia after a hiatus since 2004. Reigning champion Sean Torrente secured pole position in the qualifying session, followed by Rusty Wyatt and Stefan Arand. In the first sprint race, Torrente won, with Peter Morin and Bartek Marszalek finishing second and third, respectively. Comparato retired due to mechanical failure. In the second sprint race, Wyatt claimed victory, with Arand finishing third after a post-race penalty affected Trask. The next day's schedule includes a warm-up session, a demonstration of two-seater boats, a parade lap, and the Grand Prix of the Sardinia region.