Late spring (May-June) is the best season to visit Portugal. The weather is wonderful but without the extremes of summer, and the tourist areas are fully open but not overcrowded.
What time of year is Portugal cheapest?
Low season months of November to March are a cheaper time to visit. If you want to escape the crowds and enjoy rock-bottom prices on accommodations, plan your trip for the low season. Many museums and other attractions keep shorter hours, though you'll still find a full lineup of performances in cities and bigger towns …