Browsing in the Flickr Commons I found this High Back Beach Chair photo dating from 1917. The High Back Beach Chair was common in Scheveningen from around the 1850ies until the 1960ies. The inside is clearly lined with a nice warm blanket. So the photo was not taken in high summer.
In my post Kaigan for Ahrend you can find more about this model.
I love these seats – strange how in the UK we use (clumsy) folding deck chairs. The wind protection from these chairs must have been fantastic.