The 2006 Atlantic hurricane season was an event in the annual cycle of tropical cyclone formation. The season was unusual in that no hurricanes made landfall in the United States of America, the first such occurrence since 2001. It started on June 1, 2006, and officially ended on November 30, 2006. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin.

One system, Tropical Storm Zeta from the 2005 season, continued through early January, only the second time on record that had happened. Tropical Storm Alberto was responsible for two indirect deaths when it made landfall in Florida. Hurricane Ernesto caused heavy rainfall in Haiti, and directly killed at least seven in Haiti and the United States. Four more hurricanes formed after Ernesto, including the strongest storms of the season, Hurricanes Helene and Gordon. However, no tropical cyclones formed in the month of October, the first time this had happened since the 1994 season.

Following the intense activity of the 2005 season, forecasts predicted the 2006 season would be very active, though not as active as 2005. However, in 2006, a rapidly forming El Niño event, combined with the pervasive presence of the Saharan Air Layer over the tropical Atlantic and a steady presence of a robust secondary high related to the Azores high centered around Bermuda, contributed to a slow season and all tropical cyclone activity ceasing after October 2.