Choose the castle if you want a broad view of Lisbon and a sense of the city's older layers, not just a photograph from the walls. The grounds bring together battlements, gardens, a small museum and archaeological remains. Leave room to slow down rather than treating the castle as a quick stop on the way to Alfama.
What is worth seeing inside?
Walk the viewpoints first, then decide whether to join one of the activities included with admission. The castle's own guide lists a “Discovering the Castle” tour and a Camera Obscura tour, both subject to places and conditions. The archaeological site can only be entered with the general guided tour. If that is your main interest, ask for the next available session when you arrive. A self-guided visit still gives you the walls, gardens and museum.
Allow roughly two hours as a comfortable planning estimate, longer if you join a tour or linger at the views. This is our suggested pace, not a timed ticket requirement. The site has exposed, uneven and sloping areas; check the operator's access information and contact the castle about the exact route if step-free access is essential.
Tickets and opening times
The official visitor information currently lists €17 for a standard adult ticket. It gives daily opening from 09:00 to 21:00 in March–October and 09:00 to 18:00 in November–February, with earlier last admission. The castle closes on specified public holidays, and access to the walls can end before the grounds close. Check the operator's page for the date of your visit; do not plan a sunset on the assumption that every tower stays open until closing time.
Buy through the castle's official site or at its entrance. The operator warns about unauthorised sellers. A ticket already purchased online can save the ticket-office queue, but it does not remove the walk uphill or any security and entrance controls.
How do I get there without an exhausting climb?
The entrance is on Rua de Santa Cruz do Castelo, not at a viewpoint in Alfama. The operator suggests bus 737 from Praça da Figueira followed by a short walk, or tram 28E followed by a walk from Santa Luzia or Portas do Sol. For a walk from Baixa, its directions describe the lifts through Chão do Loureiro; check that they are operating on the day. A taxi or ride-hailing car may help with the ascent, but confirm the permitted drop-off point in the historic area.
Afterwards, go downhill through Alfama. The Museu do Fado makes a useful indoor continuation; Santa Luzia and Portas do Sol are free stops for a different angle on the river. Our viewpoints guide helps you choose one more view without crossing the city.