Beaches · Decoder · Interactive explainer

Beach warning flag decoder

Translate the beach flags you can actually see into plain-English next steps for swimmers, paddlers, children, inflatables, and surf craft. It covers both common U.S. surf-warning flags and RNLI-style patrol flags.

Decode what you saw

Results update instantly. Use the button only if you want the URL to preserve the current scenario.

Flag system

Planned activity

Water confidence

Children with you?

Using inflatables?

Observed flags

Flag meanings can vary by beach authority. Always check the signboard and the lifeguards on duty.

Why this page exists

Beach flag charts are often published without any help for the actual decision in front of you.
Different coasts use different systems, so the same red flag can mean a hazard warning in one place and a swim-zone closure in another.
Parents, weak swimmers, and people using inflatables usually need a stricter read than confident open-water swimmers do.
The safest interpretation is still local: read the signboard and ask the lifeguards what is open today.

Read the launch note for this decoder.

Selected system reference

If a rip current grabs you

Do not fight straight against it

Float, keep breathing, and stop wasting energy swimming directly into the current.

Swim parallel to the beach

Move sideways out of the narrow current, then angle back in once the pull eases.

Signal for help early

Wave and shout if you cannot make progress. Lifeguards would rather respond early than late.