Storm history › Atlantic › 1866 season
Unnamed hurricane 8, 1866 Atlantic
This storm was a Category 4 hurricane of the 1866 Atlantic season. It was tracked from September 24, 1866 to October 5, 1866, about 12 days, and covered 5,041 miles.
At its peak it had winds of 140 mph (220 km/h) and a lowest pressure of 938 mb.
Its closest pass to a major city was 108 miles from San Juan, Puerto Rico.
- Peak wind
- 140 mph
- Lowest pressure
- 938 mb
- Strongest
- Category 4 hurricane
- Landfalls
- None recorded
- Duration
- 12 days
- Track length
- 5,041 mi
- Energy (ACE)
- 40.9
DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5
Closest pass to major cities
| City | Closest pass |
|---|---|
| San Juan, Puerto Rico | 108 mi (173 km) |
| Santiago de los Caballeros, Dominican Republic | 122 mi (196 km) |
How it compares
- Peak winds: 110th highest of 2,017 Atlantic storms on record, tied with Hurricane Gabrielle (2025), Hurricane Helene (2024), Hurricane Fiona (2022) and 21 more.
- Lowest pressure: 99th lowest of 1,294 Atlantic storms with a recorded pressure, tied with Hurricane Jose (2017), Hurricane Karl (2004), Hurricane Lili (2002) and 4 more.
- Energy: 49% of the 1866 Atlantic season's ACE.