The Cayman Islands centre on Grand Cayman's Seven Mile Beach and Stingray City sandbar, with diving the Bloody Bay Wall off Little Cayman and the USS Kittiwake artificial reef sunk in 2011 off Seven Mile Beach.
Trade-wind dry season with Cayman Cookout in mid-January, Pirates Week in early November aside, and the Christmas through Easter window at peak resort demand.
Sea calmest with diving visibility past 30m at Bloody Bay Wall, rates dropping after Easter, and Batabano Carnival in early May fills George Town with parades.
Hurricane season peaks September with elevated risk, but the dive operators stay open between systems and turtle nesting on Cayman beaches at peak.
Pirates Week first weekend fills George Town with mock invasion and parades, hurricane risk fading, and the December high-season buildup beginning.