2025–26 South-West Indian Ocean cyclone season

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The 2025–26 South-West Indian Ocean cyclone season was an active and very destructive South-West Indian Ocean cyclone season. Although only 2 storms did measurable damage, it was the third costliest on record, mainly due to Cyclone Gezani, which itself became the costliest cyclone in Madagascar’s history. It officially began on 15 November 2025, and ended on 30 April 2026, with the exception for Mauritius and the Seychelles, for which it ended on 15 May 2026. 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 2025 and 30 June 2026, such as 01, Awo, Blossom and Chenge, also part of the season. 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.

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