Operators have addressed it numerous times with port captain over the past several years. As one of the founding members for the revived watersports association I know this to be fact because we tried but it seems to be too complicated for them.If there's a flag, an online webcam pointed at it would answer many inquiries. I'm surprised no one has addressed the need.
@fishwatcher - for Cozumel, there is no clear way for divers to obtain this information unless it is just obvious that the conditions are not safe - unfortunately, there have been many times the port is closed when the conditions are ideal - an operator providing the courtesy of a call to their divers or some sort of system they can check is totally reasonable and is basic customer service.