When to visit
In general, the best times to visit and experience as much as possible in Northern Portugal are between March and early June or mid-September and mid-to-late November, ideal for sightseeing and day trips.
Northern Portugal tend to be cooler and wetter than the rest of the country. The peak season is from June to the end of August, and this season offers hot and dry weather, which is suitable for spending time on the beaches.
During winter there is a very high possibility of rain.