If you are staying for the weekend or longer we have a few suggestions locally where you may like to stay and places you may like to visit.
To Stay:
Vila Do Conde | Maia | Matosinhos | Moreira
To Visit:
North - Braga | Porto | Gerês
South - Aveiro | Lisbon | Sintra | Coimbra
Hotel
HOTEL PUMA
nº776 Rua Cruz das Guardeiras, Moreira, Porto 4470-593, Portugal
This is in Maia and is really close to the airport, also only a 10 min drive by taxi/uber.
Rental Car
Auto Europe
You can go on pretty much any comparison website and you should be able to find a reasonable price and you can collect from the airport.