The temps are more moderate in the morning and early afternoon, reaching peak by about 3-5 pm. But a wind usually begins to blow around noon or 1, so if you start at a reasonable time, you'll likely be fine.
I did the Frances in 2022 and 2023, the Portuguese Coastal this spring. The first year, I had a company in Santiago, Spanish Adventures, make reservations. I walked with a friend at first, then had time on my own. I loved the quirky little hotels...
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