Saint Andrew Sound is a large, shallow saltwater lagoon located in Bay County, Florida, near Panama City and Mexico Beach. It is approximately ten miles long and one mile wide, covering about 4,707 acres. The sound is bordered almost entirely by Tyndall Air Force Base, which has kept the shoreline unaltered and contributed to stable seagrass beds. For paddlers, the sound's shallow depth makes it suitable for kayaks and small boats, but its large expanse of open water is exposed to high winds, creating potentially dangerous conditions. A significant hazard is the strong tidal current; one account describes a paddler being overtaken by whirlpools where incoming tide met river currents while attempting to cross from Jekyll Island to Cumberland Island in Georgia, a distance of over three miles. This highlights that the sound connects to a broader coastal system, and the official Georgia Coast Saltwater Paddle Trail advises using backwater creeks to avoid the open sound. While no specific public launch points within the sound itself are detailed, the Florida Circumnavigational Saltwater Paddling Trail lists it as a waypoint, and access is likely managed in conjunction with the military base. The area is noted for its natural, undeveloped character due to the Air Force presence, featuring barrier peninsulas that separate it from the Gulf of Mexico. Paddlers should be prepared for significant boat traffic crossings when navigating near channels and must exercise extreme caution regarding wind, fetch, and tidal timing.