Best Time to See Jellyfishes in South Carolina
April, March and May is the best time to see jellyfishes in South Carolina. Based on 4,123 verified iNaturalist observations, here is exactly when jellyfishes are most active across the year in South Carolina.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Cannonball Jelly · north145 CC BY
Cannonball Jelly · Caleb Catto CC BY
Cannonball Jelly · Forest Botial-Jarvis CC BY
4,123 verified observations of jellyfishes in South Carolina, recorded across 12 months of the year on iNaturalist.
When jellyfishes are recorded in South Carolina
Peak month
April
1,311 records (31.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 148 | 3.6% |
| February | 169 | 4.1% |
| Marchpeak | 781 | 18.9% |
| Aprilpeak | 1,311 | 31.8% |
| Maypeak | 685 | 16.6% |
| June | 379 | 9.2% |
| July | 103 | 2.5% |
| August | 136 | 3.3% |
| September | 94 | 2.3% |
| October | 101 | 2.4% |
| November | 99 | 2.4% |
| December | 117 | 2.8% |
Jellyfishes you are most likely to see
| Species | Verified observations |
|---|---|
| Cannonball Jelly | 2,968 |
| Mushroom Jelly | 434 |
| Dwarf Lion's Mane Jelly | 201 |
| Southern Moon Jelly | 121 |
| Bay Nettle | 22 |
| Atlantic Sea Nettle | 12 |
| Pink Meanie | 5 |
| Australian Spotted Jelly | 4 |
Weather to expect, source Open-Meteo
Typical weather in South Carolina
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 49 to 83 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 57°F | 41°F | 4.6" |
| Feb | 63°F | 44°F | 4" |
| Marbest time | 69°F | 49°F | 4" |
| Aprbest time | 76°F | 54°F | 4.5" |
| Maybest time | 83°F | 63°F | 3.4" |
| Jun | 88°F | 69°F | 4.2" |
| Jul | 92°F | 74°F | 5.2" |
| Aug | 90°F | 73°F | 4.9" |
| Sep | 85°F | 67°F | 4.1" |
| Oct | 77°F | 58°F | 2.3" |
| Nov | 66°F | 47°F | 2.7" |
| Dec | 60°F | 43°F | 4.5" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for South Carolina. Weather varies year to year, so treat these as a guide.
Sightings of jellyfishes in South Carolina peak in April, when 1,311 of the year's 4,123 verified observations are logged — about 31.8% of the annual total. Activity stays high through April, March and May.
The quietest stretch is September, November and October, when jellyfishes are hardest to find — September sees just 94 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 South Carolina are Cannonball Jelly, Mushroom Jelly and Dwarf Lion's Mane 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 South Carolina
- Charles Pinckney National Historic Site — National Historic Site
- Fort Sumter and Fort Moultrie National Historical Park — National Historical Park
- Ninety Six National Historic Site — National Historic Site
- Overmountain Victory National Historic Trail — National Historic Trail
- Congaree National Park — National Park
- Cowpens National Battlefield — National Battlefield
Frequently asked questions
What is the best month to see jellyfishes in South Carolina?+
April is the single best month, and the broader peak window runs through April, March and May, based on 4,123 verified iNaturalist observations.
When are jellyfishes hardest to see in South Carolina?+
September is the quietest month for jellyfishes in South Carolina, with only 94 verified records.
Are jellyfishes active year-round in South Carolina?+
Jellyfishes are recorded in 12 of 12 months in South Carolina, so they can be seen year-round, with a clear peak in April.
More places to see jellyfishes
More wildlife in South Carolina