Lido Beach is the true name. St. Armands applies to the roundabout or circle with the shops and restaurants. The beach has often been referred to as St. Armands Beach but in fact is Lido Beach.
That was taken in Aug 2007. At that time of year the waves can double the size of those in the video with a surface temp of 92F. It doesn't get much better than that. Note: Great montage of Lido Beach!