South Indian Ocean seasons are defined to start on July 1 of the previous year. For example, the 1990 season ran from July 1, 1989, through June 30, 1990.
Tropical cyclones with a wind speed above 39 miles per hour are considered tropical storms and are given a name.
According to the source, figures were calculated by the Colorado State University from the Joint Typhoon Warning Center best tracks as archived in the International Best Track Archive for Climate Stewardship.
Citation formats
Number of named storms in the South Indian Ocean 1990-2024
In 2024, there were ** named storms registered in the South Indian Ocean, up by *** storm in comparison to the previous year. This was down from the average recorded for the basin in the period between 1990 and 2023, at ** named storms per year. The highest count recorded within the indicated period was in 1994, with a total of ** named tropical cyclones.
Profit from the additional features of your individual account
Currently, you are using a shared account. To use individual functions (e.g., mark statistics as favourites, set
statistic alerts) please log in with your personal account.
If you are an admin, please authenticate by logging in again.
Learn more about how ÌÇÐÄÆƽâ°æ can support your business.
CSU. (February 23, 2025). Number of named tropical cyclones in the South Indian Ocean from 1990 to 2024 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 25, 2026, from /statistics/1298394/number-named-storms-south-indian-ocean/
CSU. "Number of named tropical cyclones in the South Indian Ocean from 1990 to 2024." Chart. February 23, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 25, 2026. /statistics/1298394/number-named-storms-south-indian-ocean/
CSU. (2025). Number of named tropical cyclones in the South Indian Ocean from 1990 to 2024. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 25, 2026. /statistics/1298394/number-named-storms-south-indian-ocean/
CSU. "Number of Named Tropical Cyclones in The South Indian Ocean from 1990 to 2024." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 23 Feb 2025, /statistics/1298394/number-named-storms-south-indian-ocean/
CSU, Number of named tropical cyclones in the South Indian Ocean from 1990 to 2024 ÌÇÐÄÆƽâ°æ, /statistics/1298394/number-named-storms-south-indian-ocean/ (last visited July 25, 2026)
Number of named tropical cyclones in the South Indian Ocean from 1990 to 2024 [Graph], CSU, February 23, 2025. [Online]. Available: /statistics/1298394/number-named-storms-south-indian-ocean/
