You can't miss this gorgeous aquamarine belle of the ball, a sky-blue bright mansion restored into a top hostel. The design-forward space, with marble staircases, retro furniture and local art installations, offers an above-bar shared kitchen, colourful dorms with lockers and a near wrap-around porch. There's an emphasis on water sports (surfing, windsurfing and stand-up paddleboarding) but why leave?
It's a five-minute walk from São João de Estoril station.