'Praia Knowledge' - Portugal's Best Beach?

Thanks to my friend Walter for asking: "What's a good beach to go to in Portugal, in August?"I endeavour to answer that question here, and offer my top 3 (albeit from a very limited experience) beaches, that I've enjoyed with my family.For video/images, see also: https://www.youtube.com/watch?v=g7yCzz6pfaU