What you need at this end (UK) is shorts, T-shirt, old rubbishy hoody-top and tights (for girls, too) and when you get to hot and steamy I, ditch the crappy hoody and tights.
I do that to save baggage on my airline - all the holiday stuff is in the bag which goes in the cabin, and outwards (in the cold UK) it's a rubbish coat bought for £2 in a charity shop, which gets left in a bin at the airport boarding the plane. the stuff underneath I'll wear on the hols, shorts, a pair of nude tights which keep me warm here but no-one can tell I'm wearing them - yup, I'm male ;-) and they can be ditched in Ibiza arrivals, socks (used in Ibiza) and tariners (ditto), and undies + baseball cap.
Might all sound a bit daft, but when you're faced with a £30 bill each way for hold luggage, then everyone has to cut corners. On the way back you can wear all the classy stuff you bought in Ibiza and THAT doean't have to go in the hold!