Best Overall: April–June & Sept–Oct
- Weather: Pleasant 15–25°C, low humidity, minimal rain
- Crowds: Moderate — major sights accessible without long queues
- Pricing: Shoulder-season rates (15–25% lower than peak)
- Best for: First-time visitors, families, honeymooners, photographers
- Highlights: Spring blooms in Sintra, harvest festivals in Douro, comfortable city walking