Historical record — not a forecast
Grand Isle
Grand Isle, LA has had 61 storms pass within 75 km since 1851, the strongest being an unnamed storm (1856, Category 4 Hurricane).
Location 01
Grand Isle
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The historical record
Storm history
61 tropical storms and hurricanes have passed within 75 km of Grand Isle since 1851, based on NOAA’s HURDAT2 best-track data (1851-2025). Atlantic storm counts before the mid-20th century undercount storms that stayed at sea; aircraft reconnaissance began in the 1940s and systematic satellite coverage in 1966. Storms that struck populated coastline are the most reliably recorded part of the record.
By storm category
- Tropical Depression
- 10
- Tropical Storm
- 23
- Category 1 Hurricane
- 13
- Category 2 Hurricane
- 6
- Category 3 Hurricane
- 5
- Category 4 Hurricane
- 4
By decade
- 1850s
- 2
- 1860s
- 5
- 1870s
- 2
- 1880s
- 5
- 1890s
- 4
- 1900s
- 2
- 1910s
- 1
- 1920s
- 2
- 1930s
- 4
- 1940s
- 6
- 1950s
- 2
- 1960s
- 3
- 1970s
- 8
- 1980s
- 3
- 1990s
- 1
- 2000s
- 5
- 2010s
- 2
- 2020s
- 4
Strongest & most recent
- Strongest on record
- an unnamed storm (1856, Category 4 Hurricane, 130 kt) passed within 73.2 km in 1856
- Most recent
- Ida (2021, Category 4 Hurricane, 130 kt) passed within 20.8 km in 2021
- Coordinates
- 29.21286, -90.02912
- Basin
- atlantic
Notable storms on record
- Ida (2021) — Category 4 Hurricane, 130 kt, passed within 20.8 km on 2021-08-29
- Unnamed storm (1856) — Category 4 Hurricane, 130 kt, passed within 73.2 km on 1856-08-10
- Betsy (1965) — Category 4 Hurricane, 115 kt, passed within 7.0 km on 1965-09-10
- Unnamed storm (1893) — Category 4 Hurricane, 115 kt, passed within 12.9 km on 1893-10-02
- Katrina (2005) — Category 3 Hurricane, 110 kt, passed within 42.7 km on 2005-08-29
- Unnamed storm (1915) — Category 3 Hurricane, 110 kt, passed within 35.4 km on 1915-09-29
- Unnamed storm (1860) — Category 3 Hurricane, 110 kt, passed within 3.2 km on 1860-08-11
- Unnamed storm (1855) — Category 3 Hurricane, 110 kt, passed within 51.4 km on 1855-09-16
Historical return intervals
These are plain historical averages — years of record divided by how many times a storm of that strength has passed within 75 km. They are not a probability or a forecast of a future storm; they describe how often storms of each strength have occurred in the past.
- Tropical storm strength or greater
- on average every 3.4 years, historically
- Hurricane strength
- on average every 6.2 years, historically
- Major hurricane (Cat 3+)
- on average every 19.4 years, historically
How many hurricanes and storms have hit near Grand Isle?
Since 1851, 61 tropical storms and hurricanes have passed within 75 km of Grand Isle, LA, based on NOAA HURDAT2 best-track data.
What was the strongest storm to affect Grand Isle?
an unnamed storm (1856, Category 4 Hurricane, 130 kt) passed within 73.2 km in 1856, reaching Category 4 Hurricane strength.
Is this a hurricane forecast for Grand Isle?
No. This page presents only historical, already-occurred storm data. It contains no forecast, prediction, or safety or evacuation guidance. Return-interval figures above are historical averages, not a probability of a future storm. See our methodology.
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