1866 Atlantic hurricane season
The 1866 Atlantic season had 7 storms of tropical-storm strength or more, 6 of them hurricanes and 1 major (Category 3 or stronger).
The first storm was tracked from June 1, 1866 and the last ended on January 1, 1970. The strongest by wind was Unnamed hurricane 8, 1866 Atlantic, at 140 mph (220 km/h). The season's accumulated cyclone energy (ACE) was 83.7.
- Storms
- 7
- Hurricanes
- 6
- Major
- 1
- Category 5
- 0
- ACE
- 83.7
DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5
Storms
| Storm | Dates | Peak |
|---|---|---|
| Unnamed storm 1, 1866 Atlantic | Jun 1 – Jun 6 | — |
| Unnamed hurricane 2, 1866 Atlantic | Jul 11 – Jul 16 | 105 mph |
| Unnamed hurricane 3, 1866 Atlantic | Aug 13 – Aug 18 | 105 mph |
| Unnamed storm 4, 1866 Atlantic | Aug 29 – Sep 11 | — |
| Unnamed hurricane 5, 1866 Atlantic | Sep 4 – Sep 7 | 80 mph |
| Unnamed hurricane 6, 1866 Atlantic | Sep 18 – Sep 18 | 80 mph |
| Unnamed hurricane 7, 1866 Atlantic | Sep 22 – Sep 24 | 105 mph |
| Unnamed hurricane 8, 1866 Atlantic | Sep 24 – Oct 5 | 140 mph |
| Unnamed storm 9, 1866 Atlantic | Sep 26 – Oct 2 | — |
| Unnamed storm 10, 1866 Atlantic | Oct 21 – Oct 31 | — |
| Unnamed tropical storm 11, 1866 Atlantic | Oct 29 – Oct 30 | 70 mph |