This may be a juvenile swan from this year looking to make itself a new habitat. If it likes your area and finds a mate, there is a good possibility it will stay as long as it is safe and secure from predators, has a good source of clean water, good food resources and nesting areas and of course that the swan likes the new habitat.

Unless you complete a sexing of the swan, specifically probe (which is not accurate) or DNA Sequencing on a feather (most accurate) you cannot tell just by looking at the swan. If it is indeed a juvenile, the sex organs are not completely formed at this age which makes it inaccurate to try probing. The only other way to determine sex is to see the swan during mating season. Then, males and females have various mating and nesting behavior that will readily identify the swan as male or female. Enjoy! The Regal Swan