When to go to Grand Cayman, and why no month is named here

Two calendars, and where they overlap

Grand Cayman has a tropical wet and dry climate. The wet season is May to October. The dry season is November to April. Laid over the top of that, the Atlantic hurricane season runs June to November.

Put the two together and the shape of the year falls out on its own. June to October is inside both the wet season and the storm season. November is dry but still inside the storm window. December to April is outside both. May is wet season but outside the storm window. Nobody needs a ranked list of months to work with that.

The sea temperature barely argues

January sea temperature runs about 79.9°F, which is 26.6°C. August runs about 86°F, or 30°C. The gap between the coldest published figure and the warmest is around six degrees Fahrenheit. For a trip that involves standing in three feet of water on a sandbar, that difference is real but it is not the thing that decides your trip. The season does. The water is warm in both.

What the 2.23-year figure means, and what it does not

The historic frequency of a hurricane strike or brush on the islands averages once every 2.23 years. It is a long-run average over the whole record. It is not a probability for your week, it is not a forecast, and it does not tell you that year three is safe because years one and two were busy. What it does tell you is that a storm here is a normal feature of the calendar rather than a freak event, which is worth knowing when you book inside June to November.

Why there is no monthly table on this page

Almost every page you will read on this question opens with a grid of monthly rainfall and average highs. I do not have those figures from a source I can name, so I am not printing a grid. The wet and dry windows above are published, the hurricane window is published, the two sea temperatures are published. A twelve-row table would look more authoritative and be less true.

The same goes for naming a best month. I can tell you which windows overlap. Turning that into “go in February” would be my opinion dressed as a fact, and it would ignore that the cheapest week and the emptiest boat are not in the same month as the calmest weather.

The thing that changes your day more than the month does

For a cruise passenger, the day of the week beats the month. Two reasons, both concrete. The public bus does not run on Sundays or public holidays, so a Sunday call rules out the cheap way across the island. And the North Sound is busier when several ships are in.

One reviewer of the catamaran trip put the second point better than I can:

“Everything was wonderful! The communication was excellent (because we had to switch days). All three stops were great and an appropriate amount of time. The boat was clean and very newly painted. The only thing.. I would try to go on a day when cruise boats are not in port. Much more crowded but still good !”

That is one traveller on one boat, not a rule. It is still the most actionable timing advice on this page, and it is about a day rather than a month. See getting around for the Sunday problem and the cruise port page for what a tender call involves.

Booking inside the storm window

George Town is a tender port with no cruise pier, so ships anchor offshore and a call can be cancelled in a swell. I have no figure for how often that happens and will not invent one. What I will say is that the terms on every listing matter more when you book between June and November than when you book in February, and they are printed under the booking widget below rather than paraphrased by me.

Can’t make these dates?

Browse more available grand cayman excursions and find one that fits your schedule.

Frequently asked questions