Was at the State Beach next to Hampton Harbor facing out towards the water. While observing an almost perfect display of wave/billow clouds, looking up around 40 degrees, noticed a wingless craft right at cloud level. Craft was cylinder shaped and left no contrail. Flying from North to South. Craft was moving on a steady path. There was a very reflective flash and the craft suddenly appeared metallic and VERY shiny. It immediately changed direction, quickly ascended into the cloud, never to exit. Since the clouds were in a wave like pattern, I would have surely seen it exit the cloud if it continued on it path from N to S. I have close to 20/10 vision and had zero problem observing this event. Prior to viewing craft, a completely black airplane was seen making a wide circle, high over the coastal area. I even commented to my daughter on how it didnt look like the other planes. Definitely not commercial.