I've managed to enable Windy.com on all yacht pages. So now you can see the wind on any yachts last position. Naturally it has all of windys controls, so you can change all the bits down the side like rain, snow, waves etc Also the time scale down the bottom is fully functional.
Look for the windyty forecast icon to the right of the yachts name and click it.
The windy icon to click.
Windy enabled on the yacht Tusi2, showing current wind conditions in their anchorage.