Wow! A little long, but cool. Cringed as the sailboard approached the rocks at about 1:38 remaining.Exactly, always start flying against the wind, check the speed. If it lower than 18km/h I land straight away.
It's very rare that the wind are more than 72km/h, but it happend once for me when snowboarding, have to land it and walk in deep snow to pick it up
Here's an example of gusts up to 17m/s: