Hong Kong's Leisure and Cultural Services Department announced on September 15, 2026, that red flags had been hoisted at four beaches because of big waves. The beaches affected were Stanley Main Beach, 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.

Beachgoers were advised not to swim at these beaches while the red flags were in place. The announcement was a snapshot of conditions as of that date.