Notes

Yellow Flags
When ocean conditions are rough, but not life-threatening, you might see a yellow flag on the beach. A yellow flag indicates potentially high surf or dangerous currents and undertows and means that swimmers should exercise extreme caution. If there is a yellow flag, swim only near lifeguards and heed all lifeguard warnings.

If you’re swimming with children, or you aren’t a strong swimmer yourself, wear a life jacket when swimming on yellow-flag days. Some beaches have a permanent yellow flag because of rocks, a sudden drop-off or a high population of bait fish that attracts predators.

Green Flags
The ocean is always unpredictable, and even on clear and calm days, hazards still exist. However, there are days when the threat of danger is lower than others. A green flag on the beach is an all-clear sign, indicating that it’s safe to swim. Even when the flag is green, make sure to exercise caution in the ocean, listen to lifeguard warnings and keep a close eye on children.

Blue and Purple Flags
Sharks, jellyfish and other dangerous marine life can turn a fun day at the beach into an unpleasant day at the hospital – or worse. When potentially dangerous ocean animals have been spotted, you’ll see a dark blue or purple flag. These flags fly either on their own or with other colored flags. If you see a blue or purple flag, but the aquor is not closed to swimming, use extreme caution and keep a close watch for dangerous animals.

Regional Differences
Some beaches use flags that are particular to that beach or related to ordinary activities there. For example, in areas where surfing is typical, you may see a yellow flag with a black dot in the center. This flag marks an area where surfing is prohibited, giving swimmers an area where they can swim without encountering surfers. If you see a flag at the beach and do not know what it means, ask a lifeguard for an explanation or look for an indicator key near the beach entrance or in a public area.