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Cayman Islands

Grand Cayman Monthly Weather: Rain, Temperatures

Grand Cayman monthly temperatures
Grand Cayman monthly temperatures. © 2023 Scott S. Bateman

Grand Cayman’s monthly weather is one of the hottest in the Caribbean.

The monthly weather for this western Caribbean island ranges from daytime tempertures of the mid 80s Fahrenheit in the winter to the low 90s in the summer. The climate has a dry season that goes from January through April.

Grand Cayman, the main island in the Cayman Islands chain, is one of the most popular cruise ports in the region. Cruise visitors land at the capital of Georgetown and often take advantage of several major attractions including Seven Mile Beach, Stingray City and Cayman Turtle Farm.

The island is especially popular on western Caribbean cruises that often include Jamaica, Roatan and Cozumel.

Grand Cayman Monthly Temperatures

Grand Cayman has an average high temperature that reaches into the low 90s Fahrenheit and low 30s Celsius during the summer. It is one of the few Caribbean destinations to get that hot.

The average daytime temperature ranges from 86 degrees Fahrenheit in February to 92 degrees from June through August, according to historical records from the National Meteorological Service of the Cayman Islands.

The average nighttime temperatures range from 65 degrees Fahrenheit in February to 74 degrees in June.

Although warm days make the island inviting in the winter, the cool nighttime temperatures bring down the comfort level in the water. Caribbean trade winds make swimming even more chilly during the winter.

Grand Cayman Monthly Rainfall

Cayman Islands monthly rainfall
Grand Cayman monthly rainfall. © 2023 Scott S. Bateman

The Grand Cayman climate has a distinct dry season and rainy season.

The dry season runs from January through April with average rainfall of about two inches. The number of days that it rains each month is about 10.

Rainfall increases from May through July to more than five inches a month. It jumps again and hits a high point of more than eight inches a month in September and October during the most active time of hurricanes and tropical storms during the annual Caribbean hurricane season.

March is a popular month to visit Grand Cayman because of families on spring break from schools. But anyone planning a cruise to the Cayman Islands may find that April is one of the best months to go for a combination of warm temperatures and low risk of rain.

• Grand Cayman weather by month: January - February - March - April - May - June - July - August - September - OctoberNovember - December

Scott S. Bateman is a professional journalist who has traveled widely throughout the Caribbean and the Americas. He is the author of four books about cruising in the Caribbean, Alaska and Mexican Riviera.
August 03, 2023

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