I've just completed my second winter in the Med' so think I can dispel a few myths. General statements like 'winter in the med is cold and wet' is a bit missleading, the Med' as a whole is a BIG place with a wide varity of temps and conditions.
Personaly, i'm right down in southern Spain
(Puerto De La Duquesa) and although the nights can get pretty chilly (+4 deg C is the lowest i've seen), overall it's not been bad at all. If the wind
dies down and the clouds part, it's easily warm enough to wear shorts and a T shirt in December or even January as being so far south, the sun is still pretty high in the sky even in mid winter and only stronger north easterly winds bringing cold air of the continent will make you unpack warmer clothing
The further East and North you go in the Med', the colder and wetter it will be (there was SNOW on the beach in Marseille this year!), but Southern Spain
and Gibraltar's climate is more like Northern Africa
than the rest of Europe
so is never that bad.
If you're looking for the best value and especially if you're going to be staying on board all the time, i'd say give Gibraltar
a look. You'll have a decent WIFI
connection in Marina Bay or Ocean Village marinas
and some berths even have UK satalite TV hook up included, a great luxury for those colder nights! You also have the advantage of being in a VAT and duty free zone so you can stock up on luxuries or even items for the boat and save money
there too as the bonus of it being English
speaking as well.
If i'm still down here next winter, that's where i'll be going. Duquesa and the rest of the Costa Del Sol is nice but Gib' is SO much cheaper these days and you'll get a discount on top for longer stays.