Meet the Vaavud Sleipnir: a smart wind meter that combines with your smartphone to let you measure wind direction and speed outside. You can use the companion app to see the data shared by other users. The device has two curved blades and a sensor to record 44100 measurements per second.
The Sleipnir takes accurate readings at wind speeds from 2 to 40 m/s (+/- 4% accuracy). The app automatically logs the data. You can get one of these for $60.