Rips and currents can be very dangerous, even at still water beaches. Queensland's surfing beaches are notorious for such dangers, especially for inexperienced swimmers and people unused to surf. Even strong swimmers can get into trouble. Sharks live in the sea and estuaries in Queensland but shark attacks are rare. Get local advice before you swim and never swim at dawn, dusk or night-time.
Marine stingers are a problem in coastal waters.
May. These stingers are dangerous. Never swim in the sea or river estuaries north of Gladstone between October and May unless you wear special protective clothing or swim in special enclosures. If stung, do not rub the wound. Flood the wound and any adhering tentacles with vinegar. Seek immediate medical attention.