The resilience of traditional wooden boats to a pounding sea suggests that their technology would be appropriate to the exposed environment of the beach hut.
In this case I am proposing a planked structure made form renewably produced green oak. This unseasoned timber can be readily bent and shaped but is extremely tough once it has hardened in its final form. It should provide sufficient resistance to wind driven sand and sea spray, even if not painted. In this structure it is lined with marine ply, with a waterproof membrane between the two just to make sure it stays dry inside.
The design is dual aspect to capture as much light as possible in the East West orientation of many huts on this coast.