Some people are busy saying SL water isn't real water. Of course they're right, but what they really mean is that SL water doesn't look like real water as there are no waves. Not neccesarily so. Here's a sip from the virtual waters east of the Tradewinds coast:
And here's a shot from RL. It was taken yesterday. Driving home from work when it suddenly occured to me that my RL water did in fact look quite a bit like the virtual water of SL. Flat an with very regular small waves with a very distinct direction.
So it's different. Yes, but it's not that different. Really. The picture above is also looking east off the coast of Copenhagen. The wind is around 5-6 meters per second from west, and those teeny waves are just breaking because they're washing up on the beach. Obviously - in RL - we'd have bigger waves if the wind is from east, but that's kinda rare...