For the best experience at Sintra’s Pena Palace in 2026, early morning is widely considered the superior choice, specifically arriving at the gate by 8:30 AM before the doors open at 9:00 AM. This "first entry" allows you to tour the interior of the palace and the iconic multicolored terraces before the massive tour groups arrive from Lisbon around 10:30 AM. However, a "late afternoon" visit (after 4:00 PM) is a strong alternative for those who want to experience the "Golden Hour" photography and a more mysterious atmosphere as the Atlantic mist often rolls in. The afternoon also sees a significant thinning of the crowds as day-trippers head back to the city. If you choose the morning, you can spend the rest of your day exploring the Moorish Castle or Quinta da Regaleira. Regardless of the time, in 2026 you must book a timed entry slot in advance; if you miss your window, you may be denied entry to the palace interior, making a morning slot safer to ensure you aren't delayed by Sintra's notorious traffic or the slow "tourist bus 434" shuttle.