Tropical Cyclone Iggy

Severe Tropical Cyclone Iggy (10U)

31 December 2025 - 4 January 2026

Tropical Cyclone Iggy was a small, short lived tropical cyclone in the Indian Ocean that brought heavy rainfall to Christmas Island.

An increase in westerly winds assisted in the formation of a tropical low (10U) southwest of Sumatra on 30 December. It moved quickly to the southeast and entered the Australian region (10oS) on 31 December. The low passed just to the east of Christmas Island late on 31 December producing heavy rainfall (57.8 mm of rain recorded to 9am 31 December and further 93.4 mm to 9am 1 January 2026), however no impacts were reported on the island.

The system intensified into a tropical cyclone at 0800 AWST 1 January and peaked at Category 1 intensity, with estimated maximum wind gusts near the centre of 100 km/h, before weakening below tropical cyclone intensity some 18 hours later at 0200 AWST 2 January. Iggy remained a very small cyclone, with the largest maximum gale radius only around 70 km. Overnight from 1 to 2 January, gales became confined to the eastern side of the centre before ceasing completely later on 2 January. The remaining low then drifted westward and eventually dissipated over the Indian Ocean.

Tropical Cyclone Iggy was the fifth tropical cyclone of the 2025/26 season.

From www.bom.gov.au