Let KAYAK do the searching
KAYAK users have found double rooms in Northern Portugal for as cheap as $29 (Vila Nova de Famalicão) in the last 3 days. The average price is $135.
In the last 72 hours, users have found Northern Portugal hotels for this weekend for as low as $50 (Porto) per night. Users have also found 3-star hotels from $56 (Porto) and 4-star+ hotels from $97 (Arcos de Valdevez).