You can absolutely wear shorts to the archaeological site of Pompeii in 2026, as there is no official dress code for the ruins. Unlike active religious sites in Italy such as the Vatican or St. Mark’s Basilica, where shoulders and knees must be covered, Pompeii is a secular historical park. However, travelers are strongly advised to consider the intense sun and heat of Southern Italy; lightweight linen or breathable fabrics are often preferred over denim. While shorts are fine for the ruins, keep in mind that if your itinerary includes the nearby Cathedral of Our Lady of the Rosary in the modern city of Pompei, you will need to cover your knees and shoulders to enter. Additionally, the terrain is composed of ancient, uneven cobblestones and dusty paths, so prioritize sturdy, closed-toe walking shoes over stylish sandals. Bringing a hat, high-SPF sunscreen, and a reusable water bottle is essential, as shade is extremely limited throughout the 170-acre site.