The following is a list of South-West Indian Ocean tropical cyclones before the year 1900, or 20th century.
On January 11, 1848, the first tropical cyclone on record was observed in the basin.
On 14th April 1872 there are accounts of a tropical cyclone passing over Zanzibar.
1200 deaths - 50,000 homeless. The most dramatic and the most devastating cyclone in the history of the country. Sugar production fell 42%. A third of the city of Port Louis was destroyed in a few hours.
On February 4, a cyclone hit Vohemar in northeastern Madagascar, producing a minimum pressure of .