Underwater enthusiasts will want to dive right into the clear waters of the St. Lawrence River to explore the many wrecks that rest on the riverbed. Some of the best freshwater scuba diving in the world exists in the 1000 Islands region. The water clarity provides excellent underwater visibility. Horizontal visibility of 50-70 feet in 100 depths is not unusual. There is no thermocline in this area allowing for very comfortable diving temperatures from May through October. Most importantly, Clayton is accessible to many of the quality wrecks that lay on the bottom of the St. Lawrence.
The strong current found in some area of the St. Lawrence River creates excellent drift diving conditions for those who seek artifacts. However, the many islands provide wind protection so divers can always find an alternative site, even in inclement weather.