International wedding rig

I have three weddings to attend this year, one in Morocco, one in Dublin and one in Singapore. Dublin is full-on formal, so that's taken care of, but I'm wondering what to wear in Sing and Morocco. Both those weddings will require a suit, of course, but if I wear any of my existing suits in those climates I'll collapse with dehydration after half an hour. Can anyone suggest a suit that will do for both? I was thinking about getting something made in linen, but I'd appreciate any suggestions.
Thanks in advance