The best time to go to Oeiras is typically during the shoulder seasons of spring (April to June) and autumn (September to October) when the weather is pleasant and the crowds are smaller.During these months, you'll find comfortable temperatures, ideal for exploring the town and its surroundings without the intense heat of summer. The days are generally sunny, great for enjoying the beaches or strolling through the gardens like the Marquês de Pombal Palace gardens. These seasons offer a good balance of agreeable weather and fewer people, making for a more relaxed experience.Summer (July and August) is also a popular time, especially for families looking to enjoy the beaches and water activities. While it's the warmest period, it's also the busiest, so you might encounter more visitors and higher prices for accommodation. If you're planning a summer trip, booking well in advance is advisable.Winter (November to March) is the quietest time, with cooler temperatures and more rain. However, the mild Portuguese winter can still offer pleasant, sunny days, making it a good option for those who prefer cooler weather and wish to avoid crowds entirely.