Timeline of the 1985 Atlantic hurricane season

The 1985 Atlantic hurricane season was an event in the annual Atlantic hurricane season in the north Atlantic Ocean. It featured average activity overall, with thirteen tropical cyclones, eleven tropical storms, seven hurricanes, and three major hurricanes. The season officially began on June 1, 1985 and ended November 30, 1985. These dates, adopted by convention, historically describe the period in each year when most systems form. The season's first system, Tropical Storm Ana, developed on July 15; the season's final system, Tropical Depression Thirteen, dissipated on December 9. Eight tropical cyclones made landfall in the United States, including a record-tying six hurricanes (the most in a single year since 1916).

This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It includes information that was not released throughout the season, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not initially warned upon, has been included.

The time stamp for each event is first stated using Coordinated Universal Time (UTC), the 24-hour clock where 00:00 = midnight UTC. The NHC uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) prior to 2020 were: Atlantic, Eastern, and Central. In this timeline, the respective area time is included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (miles, or kilometers), following National Hurricane Center practice. Direct wind observations are rounded to the nearest whole number. Atmospheric pressures are listed to the nearest millibar and nearest hundredth of an inch of mercury.