Hi Bumper,
Welcome To Fishing Reminder.
As Mark says, 13kmh is not a lot...Where I am today, the forecast was 8 to 12 kmh from 6am to midday. We have sub-zero temps so fog is the norm...but fog cannot stay when there is a breeze. The fog lifted today at about 11am. Maybe the hills or the valleys stopped the breeze from lifting the fog, I don't know...What I do know is there was a breeze and it felt like about 10kmh...I know because the wind chill factor made it feel like about minus 15c. If a forecast 10km breeze (8 to 12) is not enough to lift fog, then 13 is not enough to fly a kite.
I have stated many times over the years on the Forum...On a 4 star day I could throw lures into a bath tub full of water all day and not catch a thing. Would that mean the 4 star rating is wrong?
I am not sure how you "tested it". ??? How did you test it. ??
Once again, welcome to Fishing Reminder and I hope you find the information helpful
itsaboat mate...Life is just a boat and then ya marry one !