The french paragliding federation have a system of wind strength, direction and temperature balises which broadcast and are available on the internet. They give the median wind and the Maximum over a specific period. A late friend of mine installed a number of similar devices in South Africa. Sadly he lost his elevator on a power line.
The gps flyover observation is unreliable especially during high pressure systems with associated temperature inversions where the direction on either side of the layer can vary 180 degrees.
FFVL - Balises Météo