We were at Maalifushi last week, not end of June timing, but low season none the less. We weren't as fortunate with the weather as some of the others here have outlined - we got a solid mix of sun, rain and wind - but there was still plenty of sun, and when it rained it certainly wasn't all day, and generally not even hours at a time, often followed by long periods of sunshine. We had a brilliant time, even though you could probably classify the weather as average. Based on our experience and the experience of others, it seems you would have to be very unlucky to get fully rained in.