Generally, no—it is not safe to leave your belongings unattended on the beaches in Barcelona in 2026. Barceloneta and other city beaches are hotspots for highly skilled petty thieves and organized groups of pickpockets. Locals follow a strict "buddy system" where at least one person always stays with the bags while others swim. In 2026, police advise travelers to use waterproof pouches for valuables or to ask a "neighboring" family to watch their gear, though even this is risky. Thieves often work in teams, using distractions like asking for directions or "spilling" something to divert your attention. A common 2026 "pro-tip" is to bury your most valuable items in a sealed bag under your towel or to use the paid locker services available at some beach clubs and "Chiringuitos" to ensure your passport and wallet remain secure while you enjoy the Mediterranean.