This timeline documents all the storm formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation during the 2008 Pacific typhoon season.

During the year, a total of 40 systems were designated as Tropical Depressions by the Japan Meteorological Agency (JMA), who run the Regional Specialized Meteorological Centre in Tokyo, Japan.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) also assigns local names to tropical depressions which form within their area of responsibility.

The Joint Typhoon Warning Center warnings are referred to numerically to avoid confusion, as the JTWC sometimes recognises a storm at a different intensity compared to the JMA.

For the PAGASA, 21 systems formed or entered in their area during 2008, which 10 of them directly made landfall over the Philippines