Slow speed

[EsiMavic]

Today i experience a fullspeed of only 20kph but yesterday i reach the 30+ kph on gps mode. What would be the cause??

 

[colinfowler]

flying into the wind probably
wind direction changes at different altitudes

 

[EsiMavic]

flying into the wind probably
wind direction changes at different altitudes

I guess that's the cause of it coz I uploaded my flight data to auvdata it seems today and yesterday speed are of the same speed

Thanks dude!