You know the song:
Green flag = Green light! Dive!
Yellow = Caution – moderate risks
Red = Stay outside! Dangerous conditions
Double red = Water closed. End point. Geographic reference
But then… there is this purple flag flying discreetly next to them. No drama. No sirens. Just a slight purple warning that most swimmers ignore.
I remember the first time I saw a purple flag. I was on a beach in Florida, smearing myself with sunscreen, watching for the waves, when I noticed this lonely purple flag on the side. I assumed it was decorative. Maybe a beach club banner. Maybe the way someone felt “fun”.
I asked a lifeguard, “What is the purple flag for? ”
He said, “Marine pests. Jellyfish, rays, sea lice… that sort of thing. You have to be careful where you step and where you swim. ”
I had never heard of that. And I realized that most people who go to the beach don’t know it too. They see green, yellow, red. Purple is just right… there.
So what does this mean?
Harmful marine species are present. And no, these are not just annoying insects. These are biting, biting or venomous marine animals that can turn your ideal beach day into a painful memory.
Let me tell you everything you need to know about the purple flag: what it means, what marine pests to watch out for, and how to protect yourself and your family.
The Beach Flag System: A Brief Reminder
Before we get into the issue of purple, let’s review the standard flag system used on most public beaches in the United States.
Meaning of flag colors: what you should do
Quiet conditions, low risk. Safe swimming. Stay careful.
Yellow Moderate conditions, medium danger. Swim carefully. Inexperienced swimmers should stay close to shore.
Red: High danger, dangerous conditions. Stay out of the water. Strong currents, large waves or strong swells.
