Grand Cayman Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Grand Cayman, Cayman Islands in September.

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North Side West Bay Gun Bay Brinkleys

Planning a getaway to Grand Cayman, Cayman Islands this September and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Grand Cayman in September

Grand Cayman, Cayman Islands is a region in Cayman Islands. September in Grand Cayman generally has very warm temperatures, with high precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 30°C (86°F) and nighttime temperatures around 27°C (81°F) in North Side. The temperatures mentioned for both day and night are typical averages. However some days might get even hotter. It's best to stay prepared by wearing cloths suitable for the warmth.

For a closer look at conditions across Grand Cayman, Cayman Islands, refer to the map below.

Precipitation

September is a rainy month with an average rainfall of around 154 mm (6.1 in) in North Side.

Average sunshine

Plenty of sunshine can be expected in numerous places in September. North Side typically receives 240 hours of sunlight, making it ideal for those seeking sunny weather.

Explore Grand Cayman by month

Pick a month to see the average temperature, rainfall and sunshine in Grand Cayman — and find the best time to visit. (based on North Side)

January27°C (81°F) February27°C (81°F) March27°C (81°F) April28°C (82°F) May29°C (84°F) June30°C (86°F) This monthJuly30°C (86°F) August31°C (88°F) September30°C (86°F) October30°C (86°F) November29°C (84°F) December28°C (82°F)
Best Time to Visit Grand Cayman →

Best Places to Visit in Grand Cayman in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Grand Cayman.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Grand Cayman

What is the weather like in September for some of the most popular destinations in Grand Cayman, Cayman Islands?

Temperature range in Grand Cayman (September)

Precipitation variation in Grand Cayman (September)

North Side

In September North Side generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
30°C (86°F)
30°C (86°F)
Min temperature
28°C (82°F)
27°C (81°F)
27°C (81°F)
Monthly sun hours
249 hours
240 hours
248 hours
Monthly rainfall
98 mm (3.9 in)
154 mm (6.1 in)
224 mm (8.8 in)
Monthly rainy days
15 days
16 days
17 days
Weather conditions
pleasant
tolerable
poor
Climate in North Side →

West Bay

In September West Bay generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
28°C (82°F)
27°C (81°F)
27°C (81°F)
Monthly sun hours
249 hours
240 hours
248 hours
Monthly rainfall
100 mm (3.9 in)
153 mm (6 in)
224 mm (8.8 in)
Monthly rainy days
15 days
16 days
17 days
Weather conditions
tolerable
tolerable
poor
Climate in West Bay →

Gun Bay

In September Gun Bay generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
30°C (86°F)
30°C (86°F)
Min temperature
28°C (82°F)
27°C (81°F)
27°C (81°F)
Monthly sun hours
249 hours
240 hours
248 hours
Monthly rainfall
97 mm (3.8 in)
154 mm (6.1 in)
223 mm (8.8 in)
Monthly rainy days
15 days
16 days
17 days
Weather conditions
pleasant
tolerable
poor
Climate in Gun Bay →

Brinkleys

In September Brinkleys generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
30°C (86°F)
30°C (86°F)
Min temperature
28°C (82°F)
27°C (81°F)
27°C (81°F)
Monthly sun hours
249 hours
240 hours
248 hours
Monthly rainfall
98 mm (3.9 in)
154 mm (6.1 in)
224 mm (8.8 in)
Monthly rainy days
15 days
16 days
17 days
Weather conditions
pleasant
tolerable
poor
Climate in Brinkleys →

George Town

In September George Town generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
27°C (81°F)
Monthly sun hours
249 hours
240 hours
248 hours
Monthly rainfall
99 mm (3.9 in)
152 mm (6 in)
224 mm (8.8 in)
Monthly rainy days
15 days
16 days
17 days
Weather conditions
pleasant
tolerable
poor
Climate in George Town →

Is your destination not in the list? Have a look at all destinations in Grand Cayman, in Cayman Islands.

In our records: Cayman Islands September extremes

Notable September records observed across cities in Cayman Islands in our climate database (1989 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • From our sources, the wettest September day in Cayman Islands brought 171 mm (6.7 in) in Georgetown on September 28, 2010.

Popular cities in September

Day & night temperatures, rainfall and average weather in Grand Cayman in September.

City Weather Day temp Night temp Rainfall
North Side 30°C (86°F) 27°C (81°F) 154 mm (6.1 in)
West Bay 30°C (86°F) 27°C (81°F) 153 mm (6 in)
Gun Bay 30°C (86°F) 27°C (81°F) 154 mm (6.1 in)
Brinkleys 30°C (86°F) 27°C (81°F) 154 mm (6.1 in)
George Town 30°C (86°F) 27°C (81°F) 152 mm (6 in)

Grand Cayman weather in September: frequently asked questions

What is the weather like in Grand Cayman, Cayman Islands in September?

Expect unpleasant weather across Grand Cayman, Cayman Islands in September. The popular destination of North Side averages 30°C (86°F) by day and 27°C (81°F) at night during this month.

What is the average temperature in Grand Cayman, Cayman Islands in September?

North Side averages a daytime maximum of 30°C (86°F) in September, with overnight lows close to 27°C (81°F).

Does Grand Cayman, Cayman Islands get a lot of rain in September?

North Side typically receives notable rainfall in September, about 154 mm (6.1 in) on average across Grand Cayman, Cayman Islands.

Is September a Good Time to Visit Grand Cayman, Cayman Islands?

In our opinion, September is a good time to visit Grand Cayman, Cayman Islands with overall tolerable weather in North Side. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, the best visiting conditions can be found in January, February, March, April and December offering mostly perfect weather in North Side. On the other hand, the weather in October tends to be poor.

Interested in more climate information?

We have much more information about the climate in Grand Cayman.

Weather and climate has detailed information for every country in the world. Are you going to Cayman Islands? Get detailed historical weather averages for many cities in Cayman Islands.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.