The dengue mosquito, Aedes aegypti, which also can transmit other flaviviruses, was detected in Tennant Creek in February 2021, with a dedicated elimination program established immediately. The number of properties with detections of Ae. aegypti remained relatively low until December 2022. However, the program experienced a setback during the 6th round of property inspections and treatments in January and February 2023, with Ae. aegypti detected on 112 properties. The extensive breeding and subsequent dispersal of the dengue mosquito was most likely due to the extensive rainfall between October 2022 and March 2023.