2017–18 Southern Hemisphere tropical cyclone season

The 2017–18 Southern Hemisphere tropical cyclone season may refer to:


 * 2017–18 South-West Indian Ocean cyclone season, west of 90°E
 * 2017–18 Australian region cyclone season, between 90°E and 160°E
 * 2017–18 South Pacific cyclone season, east of 160°E
 * Subtropical Storm Guará
 * Subtropical Cyclone Lexi