Cayman Weather: Partly cloudy skies Loop News Created : 6 December 2017 Cayman News A high pressure ridge across the Cayman area is expected to remain across the island through to Friday. A frontal system is expected to move into the vicinity of Cayman this weekend. The Cayman Islands National Weather Service on Wednesday said that there would be partly cloudy skies with a 20% chance of showers. Temperatures will rise to the mid 80’s °F. Winds will be northeast to east at 10 to 15 knots. Seas will be moderate with wave heights of 3 to 5 feet.