The Wind Direction on each Waypoint is determined based on the wind conditions at nearby weather stations. Click here to learn more about Wind & Weather in onX Hunt.
If you see the word "Offline" in the Wind Conditions bubble above your Waypoint, or in the Wind Conditions section of the Waypoint card, this means the station nearest to that Waypoint is currently not working.
Sometimes, stations stop working for a short time and start up again, so if you wait a little while it may come back online by itself. Otherwise, you can zoom the map out until another station is visible. The Waypoint will connect to the new station and begin to report again.