Having the wind go in a predictable circle is a very dull and uninteresting game mechanic. The game would be much more dynamic, interesting, and unpredictable if real world weather data could be imported in to the game to make sailing more interesting, perhaps by getting data from a system such as this https://earth.nullschool.net/#current/wind/surface/level/orthographic=-73.37,20.55,1233/loc=-71.302,24.559
or NOAA weather data,