Depending where you start. We just ended up in Santiago june 7th ,started 6 th of May in Lisbon.
Mind there are not many albergues . We were in the Albergues in Santarèm, Mealhada ,são Pedro de Rates and Redondel. Mind in Portugal you can sleep at the bombeiros volontarios. Volontairy firebrigade offers places to sleep. So we did in Tomar
Furthermore we slept at a schoolground in Cernache nearby Coimbra look at ths forum about it and just outside Albergaria a Velha at a place with nuns. Very nice to be there
The best place to be is
Casa da Fernanda in Vitorino de Piaes. Look at this forum about it and do not forget to stop by. It was our best experience to stay overnight
For the rest we slept in hostals,residencias and one poussada de juventud in Moscavide just outside Lisbon. A youth albergue. And of course the albergue in Santiago
From Lisbon to Porto you will wAlk almost alone. from Porto you see more fellow peregrinos and from Tui you will meet the most. The last 100 km !
To us it was a great walk all away to Santiago through Portugal
If you are in Barcelos and have time visit the city of Braga one day Go there by bus
Without backpack. Great ! Well. Bom caminho