Recommended: April–May & Sept–Oct
- Weather: Pleasant 15–25°C, low humidity, minimal rain — ideal for coastal walks & vineyard tours
- Crowds: Moderate — major romantic spots like Pena Palace & Douro lodges accessible without long queues
- Pricing: Shoulder-season rates (15–25% lower than peak) for boutique hotels & private tours
- Highlights: Spring blooms in Sintra, harvest festivals in Douro, comfortable pacing for couples
- India tip: These windows align well with Indian pre-wedding & post-wedding travel seasons