The 2008–09 South-West Indian Ocean cyclone season was an event in the annual cycle of tropical cyclone formation. It began on November 15, 2008, and officially ended on April 30, 2009, with the exception for Mauritius and the Seychelles, for which it ended on May 15, 2009. These dates conventionally delimit the period of each year when most tropical cyclones form in the basin, which is west of 90°E and south of the Equator. Tropical cyclones in this basin were monitored by the Regional Specialised Meteorological Centre in Réunion.
As predicted by the sub regional office of Mauritius ten named storms formed in this basin. It officially began on November 15, but began 1 month earlier when Tropical Storm Asma formed on October 16. Most of the storms that formed this year were weak or stayed at sea. Only two storms reached hurricane strength this year, both of which were Category 3 or higher, and only 3 storms made landfall in the entire season. Overall, the impact of this season was relatively minor, but damaging for Madagascar, due to the heavy rains from Eric, Fanele, Izilda and Jade.