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.
[1] On 14th April 1872 there are accounts of a tropical cyclone passing over Zanzibar.
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 972 mbar (28.7 inHg).