Is it necessary to make reservations Porto to Santiago in late June

It has the highest growth rate of the caminos, so you can expect the infrastructure to be stressed! After your first days, you will know if calling ahead is necessary.

Olá, it is recommended to make reservations. As falcon 269 said the highest growth rate, especially from Tui on. The spaniards start there to get the Compostela.

The first day if you decide to walk along the coast to Vila do Conde you'll be fine without reservations, there is a great new albergue there and they accommodate pilgrims even on the maytresses on the second floor near the kitchen area if they run out out of beds. There you can decide if you want to continue walking along the coast or join the cetral way. Along the coast could be more expensive in summer, if other albergues run out spaces you might need to head for campsites and hotels/pensions. Orbitur campsites have special rates for pilgrims, almost stayed there for 10 euros between Povoa de Varzim and Esposende last Oct. There are more accommodation options on the central way, so maybe your feet decide for themselves where they want to drop for the night Yes, the crowds arrive from Tui, but you'll fugure it out for yourself what works for you by then. I walked the central in May 2017, was busy but no real rush for places, stayed mostly in the municipal ones all the way to Santuago.