| Basin: | SWI |
| Year: | 1967 |
| Track: | 1965–66 South-West Indian Ocean cyclone season summary.png |
| First Storm Formed: | August 9, 1965 |
| Last Storm Dissipated: | May 1, 1966 |
| Strongest Storm Name: | Ivy |
| Strongest Storm Pressure: | 925 |
| Strongest Storm Winds: | 120 |
| Average Wind Speed: | 1 |
| Total Depressions: | 12 |
| Total Storms: | 4 |
| Total Hurricanes: | 3 |
| Fatalities: | 3 |
| Five Seasons: | 1963–64, 1964–65, 1965–66, 1966–67, 1967–68 |
| Australian Season: | 1965–66 Australian region cyclone season |
| South Pacific Season: | 1965–66 South Pacific cyclone season |
The 1965–66 South-West Indian Ocean cyclone season was a near average season, despite beginning unusually early on August 9 with the formation of an early-season tropical depression, Anne.
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Backgroundcolors = canvas:canvas
BarData = barset:Hurricane bar:Month
PlotData= barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till from:15/08/1965 till:15/08/1965 color:ZD text:"Anne (TDi)" from:16/08/1965 till:18/08/1965 color:ZD text:"Brenda (TDe)" from:24/12/1965 till:03/01/1966 color:ST text:"Claude (STS)" from:02/01/1966 till:10/01/1966 color:TC text:"Denise (TC)" from:19/01/1966 till:20/01/1966 color:TD text:"Evelyn (TDe)" from:30/01/1966 till:01/02/1966 color:TD text:"Francine (TDe)" barset:break from:26/01/1966 till:02/02/1966 color:TD text:"Germaine (TDe)" from:20/02/1966 till:23/02/1966 color:TD text:"Hilary (TDe)" from:03/03/1966 till:12/03/1966 color:IT text:"Ivy (ITC)" from:03/03/1966 till:08/03/1966 color:TD text:"Martha-Judith (TDe)" from:17/03/1966 till:29/03/1966 color:TC text:"Nancy-Kay (TC)" from:22/04/1966 till:01/05/1966 color:TD text:"Lily (TDe)"
bar:Month width:6 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/08/1965 till:31/08/1965 text:August from:01/09/1965 till:30/09/1965 text:September from:01/10/1965 till:31/10/1965 text:October from:01/11/1965 till:30/11/1965 text:November from:01/12/1965 till:31/12/1965 text:December from:01/01/1966 till:31/01/1966 text:January from:01/02/1966 till:28/02/1966 text:February from:01/03/1966 till:31/03/1966 text:March from:01/04/1966 till:30/04/1966 text:April from:01/05/1966 till:15/05/1966 text:May
TextData = pos:(569,23) text:"(For further details, please see" pos:(713,23) text:"scales)"
| Basin: | SWI |
| Track: | Anne 1965 track.png |
| Formed: | August 15 |
| Dissipated: | August 15 |
| 10-Min Winds: | 20 |
Anne existed on August 15.
| Basin: | SWI |
| Track: | Brenda 1965 track.png |
| Formed: | August 16 |
| Dissipated: | August 18 |
| 10-Min Winds: | 25 |
| 1-Min Winds: | 30 |
Brenda existed from August 16 to August 18.
| Basin: | SWI |
| Track: | Claude 1965 track.png |
| Formed: | December 24 |
| Dissipated: | January 3 |
| 10-Min Winds: | 50 |
| 1-Min Winds: | 50 |
Claude existed from December 24 to January 10.
| Basin: | SWI |
| Track: | Denise 1966 track.png |
| Formed: | January 2 |
| Dissipated: | January 10 |
| 10-Min Winds: | 80 |
| 1-Min Winds: | 85 |
On January 7, Cyclone Denise passed north of Mauritius, producing wind gusts of 170km/h. Later, the storm crossed over Réunion, dropping record rainfall. Over a 24-hour period, Denise dropped 1825mm of rainfall at Foc Foc, Réunion, of which 1144mm fell over 12 hours; both precipitation totals are the highest recorded worldwide for their respective durations. Over 48 hours, precipitation totaled 2230mm at Bras Sec. The heavy rains caused flooding that killed three people, and caused severe road and crop damage.[1] [2] [3]
| Basin: | SWI |
| Track: | Evelyn 1966 track.png |
| Formed: | January 19 |
| Dissipated: | January 20 |
| 10-Min Winds: | 30 |
| 1-Min Winds: | 30 |
Evelyn existed from January 19 to January 20.
| Basin: | SWI |
| Track: | Francine 1966 track.png |
| Formed: | January 30 |
| Dissipated: | February 1 |
| 10-Min Winds: | 30 |
| 1-Min Winds: | 30 |
Francine existed from January 30 to February 1.
| Basin: | SWI |
| Track: | Germaine 1966 track.png |
| Formed: | February 14 |
| Dissipated: | February 17 |
| 10-Min Winds: | 30 |
| 1-Min Winds: | 35 |
Germaine existed from February 14 to February 17.
| Basin: | SWI |
| Track: | Hilary 1966 track.png |
| Formed: | February 20 |
| Dissipated: | February 23 |
| 10-Min Winds: | 30 |
| 1-Min Winds: | 35 |
Hilary existed from February 20 to February 23.
| Basin: | SWI |
| Track: | Ivy 1966 track.png |
| Formed: | March 3 |
| Dissipated: | March 12 |
| 10-Min Winds: | 105 |
| 1-Min Winds: | 120 |
Ivy existed from March 3 to March 12.
| Basin: | SWI |
| Track: | Martha-Judith 1966 track.png |
| Formed: | March 3 (entered basin) |
| Dissipated: | March 8 |
| 10-Min Winds: | 30 |
| 1-Min Winds: | 35 |
Judith was the tenth cyclone of the season and was formed in the Australian basin on February 23.
| Basin: | SWI |
| Track: | Nancy-Kay 1966 track.png |
| Formed: | March 17 |
| Dissipated: | March 29 |
| 10-Min Winds: | 80 |
| 1-Min Winds: | 75 |
| Basin: | SWI |
| Track: | Lily 1966 track.png |
| Formed: | April 22 |
| Dissipated: | May 1 |
| 10-Min Winds: | 30 |
| 1-Min Winds: | 25 |
Lily existed from April 22 to May 1.