2026–27 South-West Indian Ocean cyclone season

The 2026-27 South-West Indian Ocean cyclone season is the future occurrence of the annual South-West Indian Ocean cyclone season in the Southern Hemisphere. The season officially begins on 15 November 2026, and ends on 30 April 2027, with the exception for Mauritius and the Seychelles, for which will end on 15 May 2027. These dates conventionally delimit the period of each year when most tropical and subtropical cyclones form in the basin, which is west of 90°E and south of the Equator. However, tropical cyclones can form year-round with any cyclone forming between 1 July 2026 and 30 June 2027. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion and unofficially by the Joint Typhoon Warning Center.

Seasonal summary

Storm names Within the South-West Indian Ocean, tropical depressions and subtropical depressions that are judged to have 10-minute sustained windspeeds of 65 km/h (40 mph) by the Regional Specialized Meteorological Centre on Réunion island, France (RSMC La Réunion) are usually assigned a name. However, it is the Sub-Regional Tropical Cyclone Advisory Centres in Mauritius and Madagascar who name the systems. The Sub-Regional Tropical Cyclone Advisory Centre (Mauritius Meteorological Services) in Mauritius names a storm if it intensifies into a moderate tropical storm between 55°E and 90°E. If instead a cyclone intensifies into a moderate tropical storm between 30°E and 55°E then the Sub-Regional Tropical Cyclone Advisory Centre (Meteo Madagascar) in Madagascar assigns the appropriate name to the storm. Storm names are taken from three pre-determined lists of names, which rotate on a triennial basis, with any names that have been used automatically removed. New names this season are: Agueda, Bertrand, Celiwe, Dira, Emmie, Fikri, Gumbo, Hisna, Isaura, Pitsana and Wafula, which replaced Alvaro, Belal, Candice, Djoungou, Eleanor, Filipo, Gamane, Hidaya and Ialy during the 2023–24 season, and also the unused names Pelagie and Wagner, however the reason for their removals are unknown.

Season effects An eventual table will list all of the tropical cyclones and subtropical cyclones that will be monitored during the 2026–2027 South-West Indian Ocean cyclone season. Information on their intensity, duration, name, areas affected, primarily comes from RSMC La Réunion. Death and damage reports come from either press reports or the relevant national disaster management agency while the damage totals are given in 2026 or 2027 USD.

2026–27 South-West Indian Ocean cyclone season

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