A free app for Android, by Windfinder.

The Windfinder app is an essential weather and wind forecast app for sailors, surfers, kitesurfers, windsurfers, sailors, paragliders, hikers, cyclists, fishermen, sailors, and anybody who needs to be in the know about weather conditions.

Windfinder provides you with a quick and easy way to get the latest information on the weather and the waves. The app displays the current wind measurements and weather observations in more than a hundred thousand locations. It also displays the current wind direction and the speed of the wind in knots, Beaufort, mph, km/h, and m/s.

The app also provides you with wave height, wave period, and wave direction data. Moreover, you can save your favourite locations and monitor their weather conditions before you visit.