1st April to 31st October
Monday - Friday: 9:00 AM to 7:30 PM (last admission is at 6:00 PM)
Saturday - Sunday: 8:30 AM to 7:30
1st November to 31st March
Monday - Sunday: 9:00 AM to 5:00 PM (last admission is at 3:30 PM)
Best Time to Visit Pompeii
Pompeii is pretty crowded throughout the year and if you're hoping for a peaceful tour of the historic archeological site, you'll need to plan your trip to avoid peak hours. The best way to avoid queues or excessive crowds inside the city is by arriving at Pompeii when the entrance gates open, which is either 8:30 AM to 9:00 AM depending on when you visit. But make sure you reach during opening hours and not a couple of hours later became the peak hours for the Pompeii entrance are between 10:00 AM and 11:00 AM. If you do arrive at the peak hour, avoid the main entrance and head to the Piazza Anfiteatro entrance which is much less crowded.
If you can't reach Pompeii early in the morning, try and arrive at around 13:00 PM as the waiting lines begin disappearing at this point. In terms of months, November to March is low season and you'll experience generally lesser crowds during these months.