It is located at . Its total area is about 100 km².
Industrial use along the mainland foreshore has for many years caused concern for residents. In recent years however, heavy industry has reduced as urban infill has increased.
The Garden Island causeway built for access to the naval facility on Garden Island has changed dynamics of seagrass ecology in the sound, as well as changing the shoreline drift and movement of sand around into the Shoalwater Marine park area
The sound is being used increasingly for recreation and fishing as water quality has improved.