Most visitors spend around 45–60 minutes at the Maritime Museum of Lisbon, which is enough to cover the main highlights like the model-ship galleries, navigation instruments, the Galliot Pavilion, and royal barges. If you prefer a more relaxed and detailed visit, plan for 1.5–2 hours to explore the Jerónimos wing galleries, Far East collections, and maritime aviation displays without rushing.
The museum is generally self-paced rather than strictly timed-entry, so you can stay as long as you like within opening hours. However, if your ticket has a fixed entry slot, it usually applies only to entry time, not duration inside. For a deeper experience, you can extend your visit up to 2–3 hours, especially if you’re interested in naval history or want to combine it with nearby attractions like Jerónimos Monastery with Belém Tower & Pena Palace .