I look at live video on this webcam at least once a day: Grand Park Royal Cozumel en vivo, Cozumel - Webcams de MéxicoView attachment 817957
Doesn't seem too bad, unless you look closely at the palm trees...there's a steady wind from the N/NW.
By watching the palm trees and the wave action for a bit I can usually tell when the port is closed.