Hello,

if you want to know the windspeed and direction in your proposed flying area, on ground level and at greater hight then check:
https://www.windy.com
also available as App for your smartphone.
Good weather informations for free.

UAV forecast is also a good site and has apps for android and IOS

Looks nice!

Another handy one here:

https://www.aviationweather.gov/windtemp?gis=off

I'm a big fan of windy.com.  Been using it for about a year.  I do use uavforecast, but just for a quick general idea.  If the wind seems calm enough that I might want to fly, then I go to windy.com.  

The DJI app works well on my Note 5 as backup for 1800wxbrief.com

Also , there is B4UFly.

Thanks for the info.  Very informative.

It's amazing the faith so many people have in forecasts if they see them on an app or screen.
Forecasts are just forecasts and can be good or bad.
Even good forecasts may not be appropriate for the exact area where you fly or the time you are flying.

Take forecasts with a big grain of salt and learn to tell from your own senses whether the wind is suitable where you fly.

I've been using https://www.ventusky.com/ not only for pre-drone flights, but boating too. It's been very accurate for my area in Alaska.

I'm a big fan of Windyapp. This app has far-reaching possibilities to indicate which information you want to see. Moreover, the app is very accurate with the information.