Jellyfish are part of the Gulf. Here is what 17 years of beach time tells me about how often they actually show up and how seriously to take them.
How common are they
Jellyfish appear occasionally on 30A — they are not a constant presence. Most days you will not see any. When they do show up, it is usually after storms or during specific wind and current patterns that push them toward shore. They tend to come in cycles, sometimes several days in a row, then not again for weeks.
The purple flag
Walton County posts a purple flag at beach access points when dangerous marine life is present — jellyfish, stingrays, or similar. Purple flag days are not frequent, but when you see one, exercise caution in the water. You can still swim, but watch what is around you. The flag is informational, not a prohibition.
What kind of jellyfish
Most jellyfish near 30A’s shoreline are cannonball jellyfish — round, firm, mostly harmless. They do not actively sting but can cause mild skin irritation on contact. Moon jellies also appear occasionally. Portuguese man-of-wars are rare but do occur — they are blue, have long tentacles, and their sting is painful and requires actual treatment. If you see something that looks like a blue sail or balloon, stay away from it and its tentacles, which can extend well past where the body lands.
If you get stung
Rinse with seawater, not fresh water — fresh water activates unfired cells and makes it worse. Remove any visible tentacles with a card or stick, not bare hands. Topical hydrocortisone or antihistamine cream helps with mild stings. For man-of-war stings, the pain can be significant — seek help if needed. Most ordinary jellyfish stings on 30A resolve on their own within an hour.
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