For a first-time visitor in 2026, the "sweet spot" for Barcelona is 4 to 5 days. A 2-day trip only allows for a "greatest hits" tour of Gaudí’s works like the Sagrada Família and Park Güell, leaving little time for the city's true soul. With 4 days, you can dedicate Day 1 to the Gothic Quarter and Las Ramblas, Day 2 to Modernism and Eixample, and Day 3 to the beachfront and Barceloneta. By Day 4, you have the flexibility for a day trip to Montserrat or the Dali Museum in Figueres. In 2026, Barcelona has implemented new "timed entry" requirements for almost all major landmarks, so a longer stay is essential to avoid a rushed, stressful itinerary. This duration also allows you to embrace the local lifestyle—enjoying late-night tapas and long afternoon "siestas"—without feeling like you are checking boxes. If you are a slow traveler or a food enthusiast, extending to 7 days allows for a deeper dive into the Gràcia neighborhood and the local vineyard tours in the Penedès region.