An off-season Australian tropical cyclone is a tropical cyclone that existed in the Australian Region, between 90°E and 160°E, outside of the official season. The World Meteorological Organization currently defines the season as occurring between 1 November and 30 April, of the following year, which is when the majority of all tropical cyclones exist. During the off-season, systems are more likely to either develop during or persist until May, with approximately 52% of such storms occurring during that month. Occasionally, however, storms develop in October, with approximately 34% of such storms occurring during that month. As of 2022, there have been 94 tropical cyclones known to have occurred off-season.
Off-season cyclones are most likely to occur in the Coral Sea, with most affecting land in some way. Cumulatively, at least 4 deaths occurred due to the storms, the most recent off-season storm was a Tropical Cyclone 01U in July 2022.