The most popular time to visit Lisbon is in June, when the city comes alive with vibrant festivals and outdoor celebrations. During this peak season, from June to August, temperatures typically range from 20 to 28 Celsius, creating an friendly space great for exploring the city's stunning architecture, historic sites, and lively neighbourhoods.
As you wander through the narrow streets of Alfama or take in the breathtaking views from São Jorge Castle, the warm weather and longer daylight hours encourage you to soak up the local culture. The festive spirit during this time is palpable, with events like the Feast of St. Anthony bringing music, dance, and an authentic taste of Lisbon's traditions.
For those seeking a more tranquil experience, September presents a fantastic alternative. The crowds begin to thin, but the pleasant temperatures remain, averaging around 25 Celsius. This is an ideal time to enjoy outdoor dining at one of the many charming terraces, where you can indulge in fresh seafood and regional wines without the hustle and bustle of peak tourist season.
Additionally, the city's excellent public transport makes it easy to explore nearby attractions, such as Sintra or Cascais, allowing you to escape the city for a day while still returning to the comforts of your Lisbon base.