On July, the city is full of public events. We had, a few days ago, the opening of the Sea Life (I didn't visit it yet). During this month, we are going to have the WTCC ( World Touring Car Championship) and the Porto's Historical Grand Prix (with cars from the 60's, 70's, etc). The streets are full of fences and tires, and for a few kilometers you may think you are driving on a race circuity. Obviously, the traffic is a mess with all the construction going on.