Miguel Bombarda in July

April through October gives you the best weather for wandering between outdoor installations and street art. But here's what most guides won't tell you — the creative energy peaks during Lisbon's art season from September through November. Gallery openings multiply, pop-up events happen weekly, and the whole neighborhood buzzes with new exhibitions. Summer brings outdoor concerts and street festivals, though July and August can feel sweltering during midday gallery hops. Spring offers perfect temperatures and fewer crowds, ideal for discovering studios without fighting for space. Winter works too — many galleries and creative spaces operate year-round, and you'll have more intimate conversations with artists when things slow down.