From downtown Porto, you can ride the metro or just walk, but there is a ramp/incline from street level to the higher ground of the Mosteiro. I would recommend timing your visit for sunset as it is an absolutely spectacular view of Porto from here.
On the minus side, later in the evening means that the Mosteiro will be closed.
[Review 9902 overall, 1480 of 2018.]
Bruce InCharlotte 