The best days to visit Pompeii in 2026 are Tuesday and Wednesday. These mid-week days avoid the heavy weekend crowds and the "Monday rush" caused by other local museums (like the Naples Archaeological Museum) being closed. It is a "pro" tip to check the Naples cruise port schedule for your dates; if multiple large ships are docked, thousands of shore-excursion tourists will descend on the site between 10:00 AM and 1:00 PM. To have the most peaceful experience, you should either arrive at 9:00 AM sharp when the gates open or wait until after 2:30 PM when the tour groups begin to depart. One day you must strictly avoid is the first Sunday of the month, when admission is free; while it sounds like a deal, the site becomes dangerously overcrowded, and you lose the ability to book skip-the-line tickets. For the best weather and manageable crowds, May and September are the "Golden Months," offering long daylight hours and temperatures that are comfortable for walking the extensive stone streets.