The 1780 Atlantic hurricane season was an extraordinarily deadly and devastating Atlantic hurricane season, which became the deadliest Atlantic hurricane season in recorded history, with over 28,000 deaths. The season ran through the summer and fall in 1780. Four different hurricanes, one in June and three in October, caused at least 1,000 deaths each; this event has never been repeated, and only in the 1893 and 2005 seasons were there two such hurricanes. The season also had the deadliest Atlantic hurricane of all time, the Great Hurricane of 1780. Only one of the known storms was not a hurricane.