While many restaurants in Lisbon do close on Mondays, it is a common misconception that all of them do. Traditionally, Monday was the day off for many family-run "tascas" and traditional eateries to recover from the busy weekend. However, in 2026, the rise of international tourism and a more competitive dining scene means that many modern establishments, especially in high-traffic areas like Chiado, Baixa, and the Time Out Market (Mercado da Ribeira), remain open seven days a week. Most fine-dining and Michelin-starred restaurants still tend to favor a Sunday/Monday or Monday/Tuesday closure. If you are looking for authentic Portuguese food on a Monday, you might need to wander slightly further from the main squares, or check apps like TheFork or Google Maps, which are kept highly up-to-date in 2026. Pro tip: many museums in Lisbon also close on Mondays, so it is often considered the "quiet" day for the city’s service and cultural industries, making it a great time for a day trip to Sintra instead.