The Atlantic season typically starts off on the slower side, with increasing activity in August and the climatological peak arriving on Sept. 10. Here is a look at typical activity over the season: The 2025 hurricane season is expected to again have more than the usual number of storms.

In the Atlantic Basin, which includes storms that form in the Atlantic, the Caribbean Sea and the Gulf of America (formerly known as Gulf of Mexico), hurricane season lasts from June 1 until Nov. 30. Historically, 97% of all tropical cyclones in the Atlantic will form between those two dates.

Sunday marks the official start of the Atlantic hurricane season. June 1 is the first day of hurricane season in the Atlantic Ocean, the official start of a six-month period that can bring some of the most destructive and costly natural disasters to American shores.