I have fished the Western basin of the Med (France, Italy, Spain, Tunisia) quite a lot, and found the conditions relatively manageable: windy, but never as much of a swell and big surf as on the Atlantic shores.
So I would be inclined to go lighter: an 8-weight should be fine, even in winter: in summer I have found a #6 fine.
And I have found it easier to cast bigger flies, and into/across the wind, with a shorter head, but one line weight up (i.e. a #9): the object should not be to aerialise a lot of line false casting, but to minimise false casts and shoot line.
I started SWFFing over 25 years ago, and my first rod was a 9-weight, and the line was an intermediate, which I used almost all the time. This combination was designed for stripers on the US East Coast, and fine for the UK, but felt a bit heavy for the Med.
Nowadays, if I was starting out, I would start with an 8-weight, and buy TWO lines: a floater, and a fast sinking head, and could probably manage without the intermediate. With an 8-weight you could probably cast a 300-grain head: Teeny, or Orvis Depth Charge, or certainly a 250-grain. And with a head of that weight and sink rate you could probably avoid using really heavily-weighted Clousers, which can be horrid to cast; I sometime find that an unweighted Deceiver fishes really well on a fast sinking head, even in the surf.
PS: in the UK, I now mainly use a 10-weight. But I fish a lot in heavy swell, and also for pollack, which can take some stopping!