In reply to amarwck2:
Hmm, how about:
Cyprus (I've been there in October, very pleasant, hot and sunny for beach, good temp in the mountains)
Olympus National Park, Greece (also been in October to climb Olympus, very nice climate at that time)
Canary Islands (most of them have very interesting geology - I've been to Tenerife in Nov and climbed Teide, which was hot and sunny, loads of options to explore other areas)