Two bases beat five hotels.
Portugal is small on a map and slow on the ground. Most first trips try four or five stops in ten days and spend a third of the time packing. Two bases — Lisbon and Porto — with day journeys from each, gives you the same country and twice the time in it.
Distances are honest, roads are not fast.
Lisbon to Sintra or Arrábida is about 40 minutes. Lisbon to Évora, 90 minutes. Lisbon to Porto, roughly three hours by motorway or under three by train. Porto to the Douro at Pinhão, about two hours each way. The Algarve is around 2h30 south of Lisbon.
One thing a day, properly.
A day with one anchor — a cellar, a coastline, a walled town — and unplanned hours around it is the day people remember. Three anchors in a day is a transfer schedule with views.
Season changes the route, not the country.
May, June, September and early October are the best weeks: warm, long light, everything open. July and August are hot inland, so we push routes towards the Atlantic. Winter is quiet and clear, and the north looks like a drawing.