The 1969 Atlantic hurricane season officially began on June 1, 1969, and lasted until November 30, 1969. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The season was among the most active on record, with 18 tropical cyclones, 12 of which reached hurricane status; the likely reason for the increased activity was a strong La Niña which also affected the 1969 Pacific hurricane and Pacific typhoon seasons.