Most beaches are incredibly clean (many have been certified as Blue Flag beaches) and have a good range of facilities, including sun beds, cafés and bars and toilets.
Playa de la Tejita - taken early morning on a relatively cool, mid-week in early December
The beaches in Tenerife are busiest from April through September and almost deserted in wintertime. Even during peak season, don't expect to find as many gay sunbathers as in Maspalomas Beach in nearby Gran Canaria island.