Yacht out of Dubai Marina last week. Sea was 34. You do not cool down. You come out the same temperature you went in. Snorkel gear was out about four minutes. Visibility was fine. Visibility is not the problem in July. Take the 5pm slot. Sun is off the deck around seven. Twelve of us on board and there was room to move. Come back in February. Sea drops to about 22 and you can stay in it.