Hurricane season officially runs from June 1 through November 30. Although hurricanes are generally unpredictable, conventional wisdom has dictated that peak season varies by geography. In the Eastern Caribbean and along the U.S. East Coast, the season tends to be busiest between mid-August and mid-September. In the Western Caribbean, it picks up in mid-September and stretches into early November. Early- and late-season hurricanes (June and mid- to late-November respectively) are rare but not unprecedented.
An "average" hurricane season means we can expect eight to 11 tropical storms; of these five to seven could develop into full-fledged hurricanes. Note, though, that not all hurricanes strike land.