You've probably seen the familiar green, yellow, and red flags flying at the beach.
Green usually feels like a welcome sign.
Yellow tells you to be cautious.
And red?
Most people know that means the water isn't safe for swimming or that conditions are hazardous, depending on the local beach-warning system.
But then there's the purple beach flag.
It's easy to wonder what that unusual color is trying to tell you.
If you've ever arrived at the beach and spotted a purple flag flying near the lifeguard stand, don't ignore it.
In common U.S. beach-warning systems, a purple flag indicates dangerous marine life has been spotted or is present in the water. The National Weather Service specifically describes the purple flag as a warning for dangerous marine life.
That can include marine animals capable of causing injury, such as jellyfish and other stinging sea life.
So what exactly should you do when you see one?
Let's take a closer look.
What Does a Purple Flag Mean at the Beach?
A purple beach flag generally means dangerous marine life is present or has been reported in the water.
Unlike a red flag, which primarily communicates information about surf, currents, or water closure in many U.S. systems, the purple flag provides a different kind of warning.
It's telling beachgoers to be alert for marine animals that could cause injury.
The important thing to remember is that a purple flag doesn't necessarily mean the entire beach is closed.
Instead, it is a hazard warning.
And depending on the local beach's flag system, the purple flag may be flown alongside another colored flag.
That's why you might see something like a purple flag and a yellow or red flag at the same time.
Each color is communicating different information.
What Kind of Marine Life Can Trigger a Purple Flag?
The exact animal involved depends on the location and current conditions.
One of the most familiar examples is jellyfish.
Jellyfish can be difficult to spot in the water, particularly when waves, glare, and water movement make visibility poor.
Other potentially hazardous marine life may also prompt warnings depending on the local area.
The important point isn't necessarily identifying the exact animal from the beach.
It's recognizing that the lifeguards or beach authorities have identified a marine-life hazard and are giving swimmers a warning.
Pay attention to it.
Does a Purple Flag Mean You Can't Swim?
