The strongest storms of the year were Typhoon Yagi in the Western Pacific, and Cyclone Glenda of the Australian region.

The accumulated cyclone energy (ACE) index for the 2006 (seven basins combined), as calculated by Colorado State University was 761 units.

Tropical cyclones are primarily monitored by a group of ten warning centres, which have been designated as a Regional Specialized Meteorological Center (RSMC) or a Tropical Cyclone Warning Center (TCWC) by the World Meteorological Organization.

Other notable warning centres include the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), the United States Joint Typhoon Warning Center (JTWC), and the Brazilian Navy Hydrographic Center.

In the Southern Hemisphere, 11 tropical cyclones have developed or formed in the South-West Indian Ocean basin, 19 in the South-Central Pacific/Fiji Region, 14 in the South-East Indian/Southwestern Pacific/Australian Region, and including 2 in the South Atlantic/Southeastern Pacific, thus totaling to 46 tropical cyclones in the Southern Hemisphere.

Boloetse was also the strongest and most intense tropical cyclone of the month, peaking with 10-minute sustained winds of 100 mph and pressure dropping to 950 hPa/mbar.

June was a very inactive month in the year when only four tropical cyclones formed within the northern hemisphere, three of them received names.