This is a lovely part of the world and we had a great stay. We spent a lot of time on the beach, at the lovely restaurants eating seafood and drinking wine!
I would recommend the sunset hike with FlaminGO, visiting the palace at Sintra and visiting Lisbon.
It is a little off the beaten track and was tricky to get to places (supermarkets, restaurants) as we didn’t have a car. Though they are super cheap, Ubers cancelled a few times before picking us up and the roads are big and not very safe to walk on.
It would be very hot in the height of summer as there is no air con, and I’d recommend mosquito spray!