PP
Certainly don't Cx on the basis of a forecast wind (forecast low cloud, rain or poor viz would be another matter)
However if when you see the windsock and are not entirely confident that the trip will be inside your previous experience - but still feel up to giving it a try - then I suggest it would be sensible (at your level of overall experience) to say to your pax "looking at the sock the wind is a bit lumpy today so you sit tight (in the clubouse/car) while I do a quick circuit and check it out - if it is fine I will be back in a mo to collect you if it is not we can leave it for today and you can buy me a beer at xxx."
JF