Diving is good all year. Cayman has mild air temperatures of 21-27°C/70-80°F year-round and a little more rain during the summer months. The average water temperature is 26-28°C/78-82°F during all months. However, the Cayman Islands are in the hurricane belt and whilst the water temperature remains welcoming all year round for divers, the seas are not as hospitable from June to November.