Hong Kong's Leisure and Cultural Services Department announced on September 16, 2026, that red flags had been hoisted at several beaches because of big waves, according to the department's notice.

The affected beaches were Stanley Main Beach, Shek O Beach and Big Wave Bay Beach in the Southern District of Hong Kong Island, along with Silverstrand Beach and Clear Water Bay Second Beach in Sai Kung District.

The department advised beachgoers not to swim at these beaches. The notice, addressed to television and radio announcers, asked that the information be broadcast promptly. It described the red flags as a condition observed as of the announcement date, and the report does not indicate how long the warnings were expected to remain in place.