The 2023 Atlantic hurricane season saw an above average number of named storms and an average number of hurricanes and major hurricanes. There were twenty named storms during the season; seven of them strengthened into hurricanes, and three of those reached major hurricane intensity. The season officially began on June 1, 2023, and ended on November 30. These dates, adopted by convention, historically describe the period in each year when most subtropical or tropical cyclones form in the Atlantic. 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. The last system to dissipate was Hurricane Tammy, on October 28.

Hurricane Tammy was a long-lived Atlantic hurricane in October 2023 that caused minor impacts across the Leeward Islands and Bermuda. The nineteenth named storm and seventh hurricane of the 2023 Atlantic hurricane season, Tammy originated from a late-season tropical wave off the coast of West Africa that developed into a tropical storm on October 18. Tammy became a hurricane two days later, unusually late in the season for hurricanes to develop in the tropical Atlantic. and continued to intensify, aided by record warm sea surface temperatures. The hurricane then made landfall on Barbuda the next day. Afterwards, the hurricane slowly moved northwest paralleling the Leeward Islands, remaining steady in intensity for several days. On October 25, as the system began to accelerate northeast ahead of an approaching trough, Tammy intensified and peaked as a Category 2 hurricane with maximum sustained winds of 110 mph (175 km/h). It maintained hurricane strength for five days, before weakening to a tropical storm. Tammy degenerated into a post-tropical cyclone on October 28.