Timeline of the 2023 Atlantic hurricane season

These dates, adopted by convention, historically describe the period in each year when most subtropical or tropical cyclones form in the Atlantic.

[2] However, tropical cyclone formation is possible at any time of the year, as was the case this season, when an unnamed subtropical storm formed on January 16.

This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season.

The time zones utilized (east to west) are: Greenwich, Cape Verde, Atlantic, Eastern, and Central.

Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, miles, or kilometers), following National Hurricane Center practice.

The unnamed subtropical storm off the coast of New England on January 16
Tropical Storm Bret (left) and Tropical Depression Four (right) approaching the Windward Islands on June 22
Hurricane Don off the coast of Atlantic Canada on July 22
Hurricane Franklin displaying annular characteristics on August 29
Three tropical cyclones, Franklin (top center), Gert (bottom center), and Jose (right), simultaneously active in the open Atlantic on September 1; Post‑Tropical Cyclone Idalia (left) is also visible
Hurricane Lee at peak intensity on September 8
Hurricane Nigel nearing Category 2 strength, as viewed from the International Space Station on September 19
Infrared satellite loop of tropical storms Philippe (left) and Rina (right) early on September 29
Hurricane Tammy at near-peak intensity on October 25