Good: Westerly and Northerlies. Doable: Easterlies
Trust the forecast of the heaths in the area (e.g. Venevasshalli). The wind will be considerably less in the valley than out on the peaks and ridges. Generally, due to the open terrain any wind direction can work here. The Hovden weather station at the Hovden north parking can be seen here.
Advanced to Expert
The ride in front of Tjørnbrobu and the hills around is magic. The slopes are not too steep and there is lots of fun to be had around cabin. I kited most of the peaks here. Obviously you need good visibility and sunshine. Flat light wont work. There can be lots of reindeer up there. Don't disturb them! They need to preserve all energy in the winter so they can try to escape the numerous hunters in the next autumn...
When you have a forecast of 2-3 days of NW wind and spotty clouds it definitely worth the 3-4 hours hike with touring skis to the cabin (or 1 hour kite). The cabin itself is very comfy but can get crowded since it is popular with UK military service survival training.
You are far away from the road. Don't rely that you get help if anything goes wrong.
Areas like these are best enjoyed with good friends, a decent GPS and compass. Visibility can disappear crazily quick and all of a sudden you have no orientation whatsoever. Consider a satellite GPS tracker when you mess about here alone.
Follow the fjellvettreglene to the prick.
Getting there & away
There are several access possibilities. If there is wind the easiest is to start kite at the Billionairs Hill spot (Remestøylflotti) or park at Hovden north dagsparkering and walk /kite up through the trees. Another option is the Galten parking and then kite and walk up (needs good tree riding skills).
From the cabin it is mostly downhill to the road. Downhill upwind is good fun!