Especially during autumn where the wind is challenging every open hairstyle, a natural and undone hair-up will be the right choice. It keeps your hair out of your face and in place.
In the tutorial beachwave with braided headband I shared with you how you can get this awesome texture by simply braiding your damp hair and letting it dry over night.
If you go with the undone chignon deep down in your neck or high up on your head depends on what you feel and look better with.
I love both variations and I would try them both if I was you.