Contrary to the above information, I was talking with my previous employer (Gary @ ProDiver) and he tells me this is the windiest summer he has ever seen.
In the past when there were enough customers many of the Kihei small boat ramp Molokini boats would make a second trip to Molokini, but Gary said they have made very few this summer because of the stronger/earlier than normal winds.
Then a few days later when I was kayak diving the backside later than prudent, ProDiver was there with a second trip.
The good dive sites
we dive regularly are on the leeward sides of the Island but there are really good dive sites on the windward side; we just don't do them except when the wind and waves are right; which is not very often.
This may mean the winds have been a little off their normal heading because even when small craft warnings are up my infrequent trips back from Lanai around noon have not seemed windier than normal.
IMHO, the summer is the windiest time for Molokini/South Maui, because as Kihei/Wailea/Makena heats up a huge column of air rises and the trades get "sucked" over to fill the void.
Other than that; dive early then dive again if it's good