On September 14, 2026, the Leisure and Cultural Services Department announced that red flags had been hoisted at three Hong Kong beaches because of big waves, according to a government notice published on that date. The affected beaches were Shek O Beach and Big Wave Bay Beach in Southern District on Hong Kong Island, and Clear Water Bay Second Beach in Sai Kung District.

The department advised beachgoers not to swim at these beaches while the red flags were in place. The notice was issued as a public announcement for swimmers and was addressed to television and radio announcers, asking them to broadcast the information as soon as possible.

The warning applied only to these three beaches. The notice did not state how long the red flags would remain up or whether conditions at other beaches were affected.