An incredible place
This is a very nice beach, and in the main part (it is very long) you'll find there's barely anyone there. There is a small train that takes you (for just one euro each way) from the city to a little tourism complex, passing through the marshes, the "Ria Formosa Natural Park". You can also walk there, and if you are able to do so, we advise it; it's an easy walk and the trails and landscapes are very interesting. In the complex there are a couple of interesting things, like the bar, but above all there's a very interesting cemetery with anchors.