If you see a single flag that's half red and half yellow, the area you're in is among the safest on the beach. The flags indicate an area is protected by lifeguards and is being closely supervised.

Rip currents pose the greatest threat to swimmers, but beachgoers should also be careful about wildlife and sun exposure.

A red flag means there are 4-foot plus waves, so the currents could be enough to drown even experienced swimmers. Also, in South Haven: beachgoers may get fined during red flag conditions; A green ...

A red flag means “high hazard,” so expect big waves and/or strong currents. You’re technically allowed to swim, but only skilled swimmers should do so (and with the utmost caution). 4.