For a meaningful visit to the Pompeii Archaeological Park in 2026, you should budget between 3 to 5 hours. The site spans over 66 hectares (165 acres), and even a focused "highlights" route—including the Forum, the Stabian Baths, the House of the Faun, and the Amphitheatre—requires about 3 hours of walking on uneven ancient stone streets. If you are a history enthusiast who wants to visit the outlying Villa of the Mysteries or explore the quieter residential alleys, you should plan for a full day (5–7 hours). Due to the high heat and lack of shade, many travelers prefer a 9:00 AM start to beat the midday sun and the heavy tour group crowds that typically arrive by 11:00 AM. It is important to note that there is no re-entry once you exit, so ensure you utilize the restrooms and café located near the Forum before leaving the main archaeological area.