South Indian Ocean
JTWC best track. Season labeled by the year it ends in (Jul-Jun cyclone year).
ACE to date, 2026
South Indian Ocean · cumulative Accumulated Cyclone Energy by calendar date, vs 1996–2025
2026 to date1996–2025 median10th–90th percentile range
Storm Activity by Season
South Indian Ocean · Accumulated Cyclone Energy (ACE), 1911–2026 · full history, colored by ENSO phase at that season's peak (ONI, 1950–present)
El Niño season (ONI ≥ 0.5)La Niña season (ONI ≤ -0.5)Neutral
| Season | NS | NS Days | H | H Days | MH | MH Days | IH | C5 | ACE | H Landfalls | MH Landfalls |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 20 | 106.25 | 11 | 33.25 | 6 | 10.25 | 3 | 1 | 165.74 | 9 | 4 |
| 2025 | 21 | 120.75 | 13 | 45.00 | 10 | 17.75 | 7 | 1 | 215.71 | 7 | 4 |
| 2024 | 16 | 76.00 | 10 | 20.75 | 4 | 6.50 | 4 | 1 | 111.49 | 3 | 0 |
| 2023 | 12 | 92.25 | 7 | 42.75 | 4 | 17.00 | 3 | 1 | 198.48 | 3 | 1 |
| 2022 | 18 | 78.75 | 8 | 22.00 | 5 | 6.50 | 4 | 0 | 117.34 | 3 | 1 |
| 2021 | 18 | 90.25 | 8 | 23.50 | 3 | 8.50 | 2 | 1 | 140.32 | 3 | 0 |
| 2020 | 17 | 66.25 | 9 | 20.00 | 5 | 3.25 | 1 | 1 | 91.82 | 2 | 1 |
| 2019 | 18 | 107.25 | 13 | 48.00 | 11 | 20.00 | 10 | 0 | 220.52 | 3 | 2 |
| 2018 | 13 | 76.50 | 10 | 25.25 | 4 | 10.00 | 2 | 1 | 133.39 | 4 | 0 |
| 2017 | 11 | 47.50 | 5 | 9.25 | 2 | 2.50 | 2 | 1 | 61.85 | 2 | 1 |
| 2016 | 9 | 45.25 | 5 | 19.00 | 3 | 8.50 | 3 | 1 | 98.89 | 0 | 0 |
| 2015 | 16 | 67.00 | 8 | 27.50 | 5 | 10.75 | 4 | 2 | 130.41 | 2 | 0 |
| 2014 | 14 | 62.75 | 8 | 25.25 | 6 | 13.75 | 5 | 1 | 136.75 | 2 | 1 |
| 2013 | 16 | 69.00 | 10 | 30.00 | 6 | 7.25 | 4 | 0 | 120.74 | 2 | 0 |
| 2012 | 16 | 76.00 | 9 | 24.50 | 2 | 7.75 | 2 | 0 | 122.78 | 3 | 1 |
| 2011 | 12 | 46.75 | 5 | 10.25 | 1 | 0.75 | 0 | 0 | 53.85 | 1 | 0 |
| 2010 | 14 | 57.75 | 8 | 19.75 | 5 | 9.00 | 4 | 1 | 104.40 | 3 | 1 |
| 2009 | 18 | 62.00 | 7 | 14.50 | 4 | 5.50 | 2 | 0 | 81.40 | 2 | 1 |
| 2008 | 21 | 103.00 | 10 | 32.50 | 5 | 7.75 | 3 | 0 | 156.54 | 3 | 2 |
| 2007 | 14 | 77.00 | 11 | 38.25 | 8 | 13.00 | 4 | 0 | 158.98 | 7 | 4 |
| 2006 | 15 | 56.25 | 5 | 19.50 | 5 | 8.75 | 4 | 0 | 100.90 | 2 | 1 |
| 2005 | 18 | 67.75 | 7 | 26.75 | 4 | 11.75 | 2 | 1 | 130.83 | 4 | 3 |
| 2004 | 15 | 97.00 | 11 | 39.75 | 6 | 14.75 | 4 | 1 | 177.48 | 5 | 3 |
| 2003 | 18 | 83.75 | 10 | 36.50 | 5 | 13.00 | 3 | 2 | 157.64 | 2 | 0 |
| 2002 | 16 | 84.00 | 10 | 36.50 | 7 | 15.75 | 5 | 1 | 175.53 | 3 | 2 |
| 2001 | 13 | 58.00 | 8 | 26.50 | 4 | 6.00 | 1 | 0 | 103.22 | 1 | 1 |
| 2000 | 18 | 108.50 | 11 | 48.00 | 7 | 14.00 | 7 | 0 | 198.41 | 7 | 4 |
| 1999 | 21 | 90.75 | 9 | 31.50 | 5 | 14.50 | 4 | 1 | 164.19 | 5 | 3 |
| 1998 | 13 | 69.50 | 5 | 16.00 | 2 | 4.00 | 2 | 0 | 87.83 | 0 | 0 |
| 1997 | 19 | 137.75 | 10 | 42.50 | 5 | 13.75 | 4 | 0 | 213.28 | 3 | 1 |
| 1996 | 19 | 93.50 | 13 | 44.25 | 7 | 16.00 | 6 | 2 | 201.51 | 6 | 3 |
| 1995 | 15 | 82.50 | 10 | 34.25 | 7 | 10.00 | 3 | 0 | 143.97 | 4 | 3 |
| 1994 | 23 | 126.00 | 14 | 51.25 | 7 | 14.50 | 3 | 1 | 233.63 | 5 | 3 |
| 1993 | 15 | 62.25 | 6 | 18.00 | 2 | 4.50 | 1 | 0 | 90.21 | 0 | 0 |
| 1992 | 16 | 69.75 | 7 | 36.25 | 7 | 15.50 | 6 | 0 | 158.71 | 2 | 1 |
| 1991 | 13 | 75.00 | 7 | 23.75 | 2 | 4.00 | 1 | 0 | 114.58 | 0 | 0 |
| 1990 | 19 | 109.50 | 13 | 43.50 | 4 | 8.25 | 2 | 0 | 179.73 | 1 | 0 |
| 1989 | 20 | 96.00 | 12 | 43.00 | 6 | 10.75 | 3 | 1 | 174.10 | 3 | 1 |
| 1988 | 13 | 63.75 | 7 | 15.00 | 2 | 4.50 | 2 | 0 | 85.18 | 3 | 0 |
| 1987 | 12 | 69.75 | 5 | 12.00 | 2 | 1.50 | 0 | 0 | 71.32 | 2 | 2 |
| 1986 | 23 | 111.00 | 12 | 43.25 | 7 | 10.00 | 3 | 0 | 182.87 | 1 | 0 |
| 1985 | 8 | 46.75 | 8 | 22.00 | 4 | 2.75 | 1 | 0 | 88.88 | 2 | 0 |
| 1984 | 24 | 115.75 | 11 | 39.75 | 3 | 7.25 | 1 | 0 | 176.54 | 6 | 2 |
| 1983 | 11 | 38.25 | 6 | 6.75 | 0 | 0.00 | 0 | 0 | 41.86 | 2 | 0 |
| 1982 | 19 | 116.75 | 8 | 38.25 | 2 | 6.25 | 1 | 0 | 168.37 | 3 | 0 |
| 1981 | 21 | 110.25 | 10 | 42.50 | 8 | 11.50 | 2 | 0 | 179.82 | 1 | 1 |
| 1980 | 18 | 140.25 | 12 | 49.75 | 10 | 18.25 | 6 | 1 | 254.60 | 4 | 3 |
| 1979 | 16 | 97.75 | 5 | 29.00 | 5 | 6.75 | 1 | 0 | 142.07 | 3 | 1 |
| 1978 | 21 | 104.25 | 9 | 29.75 | 4 | 5.50 | 2 | 0 | 142.28 | 1 | 0 |
| 1977 | 14 | 106.75 | 9 | 27.00 | 1 | 0.75 | 0 | 0 | 121.52 | 5 | 0 |
| 1976 | 14 | 99.25 | 7 | 23.50 | 3 | 5.25 | 1 | 0 | 124.64 | 4 | 1 |
| 1975 | 22 | 101.25 | 6 | 21.75 | 3 | 4.75 | 2 | 0 | 121.29 | 4 | 1 |
| 1974 | 16 | 101.50 | 8 | 18.50 | 0 | 0.00 | 0 | 0 | 102.39 | 1 | 0 |
| 1973 | 23 | 139.75 | 13 | 50.25 | 3 | 4.25 | 1 | 0 | 200.20 | 1 | 0 |
| 1972 | 17 | 105.00 | 9 | 29.75 | 2 | 5.25 | 1 | 0 | 138.22 | 4 | 1 |
| 1971 | 21 | 159.50 | 14 | 56.75 | 3 | 2.25 | 1 | 0 | 210.41 | 3 | 1 |
| 1970 | 18 | 123.25 | 11 | 38.75 | 2 | 10.25 | 2 | 0 | 175.22 | 3 | 0 |
| 1969 | 12 | 55.50 | 5 | 10.00 | 0 | 0.00 | 0 | 0 | 52.41 | 1 | 0 |
| 1968 | 17 | 118.00 | 10 | 45.75 | 2 | 2.25 | 0 | 0 | 157.20 | 1 | 0 |
| 1967 | 15 | 65.50 | 6 | 9.75 | 0 | 0.00 | 0 | 0 | 57.99 | 2 | 0 |
| 1966 | 17 | 80.00 | 7 | 18.50 | 1 | 1.00 | 0 | 0 | 82.55 | 2 | 0 |
| 1965 | 22 | 64.50 | 7 | 7.00 | 0 | 0.00 | 0 | 0 | 49.71 | 1 | 0 |
| 1964 | 19 | 97.00 | 11 | 32.25 | 1 | 1.25 | 0 | 0 | 110.88 | 4 | 0 |
| 1963 | 17 | 88.00 | 8 | 31.25 | 2 | 0.75 | 0 | 0 | 109.34 | 3 | 1 |
| 1962 | 15 | 80.75 | 5 | 22.50 | 0 | 0.00 | 0 | 0 | 78.35 | 3 | 0 |
| 1961 | 11 | 69.00 | 5 | 23.00 | 2 | 2.75 | 1 | 0 | 90.27 | 4 | 3 |
| 1960 | 8 | 38.50 | 4 | 17.75 | 0 | 0.00 | 0 | 0 | 42.68 | 2 | 0 |
| 1959 | 10 | 44.75 | 6 | 13.75 | 0 | 0.00 | 0 | 0 | 38.67 | 1 | 0 |
| 1958 | 9 | 27.25 | 3 | 10.25 | 0 | 0.00 | 0 | 0 | 26.07 | 0 | 0 |
| 1957 | 7 | 27.00 | 2 | 5.25 | 1 | 0.50 | 0 | 0 | 25.80 | 0 | 0 |
| 1956 | 9 | 38.25 | 4 | 8.00 | 0 | 0.00 | 0 | 0 | 29.15 | 1 | 0 |
| 1955 | 12 | 28.25 | 5 | 7.50 | 1 | 0.25 | 0 | 0 | 24.36 | 1 | 0 |
| 1954 | 5 | 26.00 | 2 | 10.00 | 0 | 0.00 | 0 | 0 | 24.74 | 1 | 0 |
| 1953 | 8 | 32.00 | 6 | 15.50 | 0 | 0.00 | 0 | 0 | 35.12 | 2 | 0 |
| 1952 | 13 | 62.25 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 30.58 | 0 | 0 |
| 1951 | 11 | 74.75 | 3 | 8.25 | 0 | 0.00 | 0 | 0 | 47.62 | 1 | 0 |
| 1950 | 8 | 23.25 | 1 | 0.25 | 0 | 0.00 | 0 | 0 | 11.77 | 0 | 0 |
| 1949 | 11 | 52.25 | 1 | 8.75 | 0 | 0.00 | 0 | 0 | 36.41 | 0 | 0 |
| 1948 | 7 | 15.50 | 1 | 3.75 | 0 | 0.00 | 0 | 0 | 12.13 | 0 | 0 |
| 1947 | 9 | 24.00 | 1 | 0.50 | 0 | 0.00 | 0 | 0 | 12.47 | 0 | 0 |
| 1946 | 4 | 4.50 | 1 | 1.75 | 0 | 0.00 | 0 | 0 | 4.31 | 0 | 0 |
| 1945 | 7 | 20.75 | 3 | 9.25 | 0 | 0.00 | 0 | 0 | 23.04 | 2 | 0 |
| 1944 | 4 | 11.25 | 1 | 0.75 | 0 | 0.00 | 0 | 0 | 7.21 | 0 | 0 |
| 1943 | 7 | 16.75 | 2 | 2.00 | 0 | 0.00 | 0 | 0 | 12.18 | 1 | 0 |
| 1942 | 6 | 10.00 | 1 | 0.25 | 1 | 0.25 | 0 | 0 | 6.89 | 1 | 1 |
| 1941 | 9 | 23.75 | 1 | 0.25 | 1 | 0.25 | 0 | 0 | 12.62 | 1 | 1 |
| 1940 | 6 | 28.00 | 1 | 8.25 | 0 | 0.00 | 0 | 0 | 23.82 | 1 | 0 |
| 1939 | 5 | 22.75 | 1 | 2.25 | 0 | 0.00 | 0 | 0 | 13.85 | 0 | 0 |
| 1938 | 3 | 6.25 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 3.19 | 0 | 0 |
| 1937 | 7 | 44.75 | 1 | 2.25 | 0 | 0.00 | 0 | 0 | 24.67 | 0 | 0 |
| 1936 | 5 | 12.25 | 3 | 2.75 | 0 | 0.00 | 0 | 0 | 9.44 | 1 | 0 |
| 1935 | 7 | 25.25 | 1 | 4.75 | 0 | 0.00 | 0 | 0 | 18.07 | 2 | 0 |
| 1934 | 6 | 35.50 | 4 | 27.00 | 0 | 0.00 | 0 | 0 | 49.80 | 4 | 0 |
| 1933 | 4 | 29.00 | 2 | 19.50 | 0 | 0.00 | 0 | 0 | 37.61 | 1 | 0 |
| 1932 | 7 | 17.75 | 1 | 5.25 | 0 | 0.00 | 0 | 0 | 15.04 | 1 | 0 |
| 1931 | 2 | 14.50 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 7.10 | 0 | 0 |
| 1930 | 6 | 15.50 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 7.68 | 0 | 0 |
| 1929 | 5 | 12.25 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 6.04 | 0 | 0 |
| 1928 | 5 | 18.25 | 1 | 5.25 | 0 | 0.00 | 0 | 0 | 15.24 | 1 | 0 |
| 1927 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 0.00 | 0 | 0 |
| 1926 | 5 | 15.50 | 1 | 4.25 | 0 | 0.00 | 0 | 0 | 12.77 | 1 | 0 |
| 1925 | 4 | 7.00 | 1 | 0.25 | 0 | 0.00 | 0 | 0 | 4.12 | 1 | 0 |
| 1924 | 1 | 4.25 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 2.08 | 0 | 0 |
| 1923 | 3 | 5.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 2.61 | 0 | 0 |
| 1922 | 4 | 12.25 | 1 | 3.25 | 0 | 0.00 | 0 | 0 | 10.02 | 1 | 0 |
| 1921 | 4 | 18.00 | 1 | 10.25 | 0 | 0.00 | 0 | 0 | 21.33 | 0 | 0 |
| 1920 | 3 | 5.75 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 2.82 | 0 | 0 |
| 1919 | 2 | 6.50 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 3.19 | 0 | 0 |
| 1918 | 4 | 17.00 | 3 | 13.75 | 0 | 0.00 | 0 | 0 | 24.90 | 1 | 0 |
| 1917 | 4 | 15.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 7.43 | 0 | 0 |
| 1916 | 4 | 14.00 | 1 | 2.25 | 0 | 0.00 | 0 | 0 | 9.56 | 1 | 0 |
| 1915 | 4 | 9.00 | 3 | 7.75 | 0 | 0.00 | 0 | 0 | 13.71 | 3 | 0 |
| 1914 | 1 | 11.25 | 0 | 0.00 | 0 | 0.00 | 0 | 0 | 5.51 | 0 | 0 |
| 1913 | 4 | 21.00 | 3 | 16.75 | 0 | 0.00 | 0 | 0 | 30.39 | 2 | 0 |
| 1912 | 6 | 29.50 | 2 | 8.50 | 0 | 0.00 | 0 | 0 | 24.66 | 0 | 0 |
| 1911 | 1 | 0.25 | 1 | 0.25 | 0 | 0.00 | 0 | 0 | 0.64 | 1 | 0 |