I've never been to Portugal before and I'm trying to decide how long to spend in Lisbon and how long to stay in Porto. I will be in London for the weekend and then arrive to Lisbon around noon on Monday, May 11 and leave at 10:00am on the following Monday, May 16 from Porto and then flying back to Toronto. I'm staying fairly central in both cities.
When I'm on vacation I mostly like to just walk around and look at things: buildings, monuments, etc. I don't really go into many museums or pay for any attractions, I just like walking and seeing things. For eating I prefer to grab a quick bite and be on my way, not one for sitting down for fancy meals.
While in Lisbon I'm going to take a day (maybe Wed) to do Sintra (with a quick stop at Cabo da Roca).
With that all in mind, what day should I head to Porto? Currently thinking of leaving Lisbon either Friday around 6:00pm, Saturday around 9:00am, or Saturday around 6:00pm, but I guess it all depends on what ratio of time I should spend in Libson vs Porto. All opinions would be appreciated! I'll also post this in the Lisbon forum.