Advice on Diving in Oman

...would have to be May. During this month, one has the highest probability of swimming in 'blue water' with visibility well over 10 metres. Generally, Oman is dive-able all year round, although the winter months are not the greatest - the water falls below 20 degrees (C) and the visibility is usually quite bad. I would say November, december, january and february are far from ideal. The summer is also not ideal since the heat is extreme and frankly being out on a boat for 2-3 dives is simply unsafe as you are risking dehydration and a heat stroke - therefore I would rule out June, July and Augus...