Okay. At this time I do research to the coastal part from Lisbon.
You will find excellent information on the subforum caminho do Mar here.
You can start in Cascais or Estoril ,west of Lisbon and walk either to Nazaré at the coast or Fátima more inland . On this part of the caminho are no albergues but only hostals and hotels.
I did not researched further than Nazaré and Fatima because this year we will not go on to Santiago but stay in Portugal. I should say, walk to Fatima and connect from there by bus to Tomar with its world heritage Templars covent -not to be missed !-and hit the central Portuguese caminho from there. From Tomar allmost every stage is around 20 kms to your next place to sleep.
Alvaiazère, Ansiāo,Cernache ,Coimbra-stay there an extra day if you can and visit the famous university with the medieval library and attend a fado rehearsal at 17h00 opposite the cathedral with a glass of portwine
.
Further to Mealhada where just past the village is albergue Hilario's in Sernadelo .they serve a local and famous porc dish !
Next place is Águeda, Albergaría a Velha- just outside past the village is the sanctuary Casa Diocesana where you can sleep and nuns treat you well with a diner and breakfast for a few euros per person.
From there to Oliveira de Azameís and Sāo Joā da Madeira .
Your next stage to Porto will be a longer one but you could walk to Grijo and from there to Porto or take public transport from there to Porto.
From Porto all stages are around 20 kms except the coastal detour to Vila do Conde and the last one from Padrón to Santiago.
To Vila do Conde you could walk to Matosinhos first and return back to Porto by metro or bus #500 or take the metro to there -stop Mercado- and start your second part of the Portuguese caminho there.I posted an alternative to Matosinhos at the other bank of the river and take the pedestrian ferry nearby the ocean.
https://www.caminodesantiago.me/community/threads/cathedral-to-matosinhos.38537/#post-380805
Do not forget to stay at
casa da Fernanda between Barcelos and Ponte de Lima.give Fernanda a call on beforehand because specially in The summer months. It can be busy.
+351 914 589 521.
Maybe you see us there because my wife and I will be hospitaleiro at Fernanda's end of june before we return home after our camping and walking journey through Portugal.
Bom caminho