the wind in Carrapateira is waaaay much lighter than Lagos and Alvor. Don't go there hoping to kite unless it's nuking in Lagos and Sagres. Plus it's deceiving because when you arrive at the bluff overlooking the beach, the wind always feel stronger than it really is in the water. If the wind in Sagres is strong, but it's too light to kite in Carrapateira, head down to Cordoama near Vila do Bispo where the wind is a bit stronger. You have to watch out for rocks in the water but it's the best option in the west coast near Sagres.
If it's blowing from SW in Sagres (very rare in the summer but it happens sometimes) you can ride in Martinhal.
In Sagres (especially the west coast) a wetsuit is advised (at least a shorty). In Alvor you can stick to boardshorts especially if you only ride in the lagoon.
You can check the wind live in Lagos and other Algarve spots in this website