Best Time to See Jellyfishes in Louisiana
October, September and November is the best time to see jellyfishes in Louisiana. Based on 69 verified iNaturalist observations, here is exactly when jellyfishes are most active across the year in Louisiana.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
Cannonball Jelly · Tom Kennedy CC BY
Bay Nettle · Kent Miller CC BY-ND
Bay Nettle · Brandon Johnson CC BY
69 verified observations of jellyfishes in Louisiana, recorded across 12 months of the year on iNaturalist.
When jellyfishes are recorded in Louisiana
Peak month
October
29 records (42% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 3 | 4.3% |
| February | 2 | 2.9% |
| March | 3 | 4.3% |
| April | 4 | 5.8% |
| May | 1 | 1.4% |
| June | 1 | 1.4% |
| July | 2 | 2.9% |
| August | 4 | 5.8% |
| Septemberpeak | 10 | 14.5% |
| Octoberpeak | 29 | 42% |
| Novemberpeak | 8 | 11.6% |
| December | 2 | 2.9% |
Jellyfishes you are most likely to see
| Species | Verified observations |
|---|---|
| Southern Moon Jelly | 16 |
| Bay Nettle | 14 |
| Mushroom Jelly | 6 |
| Cannonball Jelly | 5 |
| Pink Meanie | 2 |
Weather to expect, source Open-Meteo
Typical weather in Louisiana
Recent typical conditions by month, so you can plan a trip around both when jellyfishes are active and what the weather is doing. The best months to look for jellyfishes sit around 50 to 90 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 61°F | 44°F | 5.6" |
| Feb | 64°F | 46°F | 5.3" |
| Mar | 72°F | 54°F | 5.8" |
| Apr | 76°F | 58°F | 7.8" |
| May | 85°F | 67°F | 6" |
| Jun | 90°F | 73°F | 4.9" |
| Jul | 91°F | 75°F | 8.2" |
| Aug | 93°F | 76°F | 4.7" |
| Sepbest time | 90°F | 71°F | 4.1" |
| Octbest time | 80°F | 62°F | 3.7" |
| Novbest time | 69°F | 50°F | 3.8" |
| Dec | 65°F | 48°F | 4.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Louisiana. Weather varies year to year, so treat these as a guide.
Sightings of jellyfishes in Louisiana peak in October, when 29 of the year's 69 verified observations are logged — about 42% of the annual total. Activity stays high through October, September and November.
The quietest stretch is May and June, when jellyfishes are hardest to find — May sees just 1 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The jellyfishes you are most likely to encounter in Louisiana are Southern Moon Jelly, Bay Nettle and Mushroom Jelly — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see jellyfishes in Louisiana
- Jean Lafitte National Historical Park and Preserve — National Historical Park and Preserve
- Cane River Creole National Historical Park — National Historical Park
- El Camino Real de los Tejas National Historic Trail — National Historic Trail
- New Orleans Jazz National Historical Park — National Historical Park
- Poverty Point National Monument — National Monument
- Vicksburg National Military Park — National Military Park
Frequently asked questions
What is the best month to see jellyfishes in Louisiana?+
October is the single best month, and the broader peak window runs through October, September and November, based on 69 verified iNaturalist observations.
When are jellyfishes hardest to see in Louisiana?+
May is the quietest month for jellyfishes in Louisiana, with only 1 verified records.
Are jellyfishes active year-round in Louisiana?+
Jellyfishes are recorded in 12 of 12 months in Louisiana, so they can be seen year-round, with a clear peak in October.
More places to see jellyfishes
More wildlife in Louisiana