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Caribbean Weather in September

Few cruises go to Cayman Islands in September because of high average rainfall.
Ugh. That's probably the best word to describe Caribbean weather in September.

September is the most active month of the Caribbean hurricane season. Historically, the region sees an average of four tropical storms, of which three become hurricanes and two become major hurricanes.

As a result, most Caribbean destinations have the highest amount of monthly rainfall during September with some places receiving more than 13 total inches.

Rain in September


Nearly every location is likely to have heavy rain except for one -- the ABC islands of Aruba, Bonaire and Curaçao off the coast of Venezuela.

They are especially arid places that average only about one to two inches of rain, which is why they are popular during that time of year.

LocationAvg Min TempAvg Max TempRain InchesRain Days
Antigua7787611
Aruba80911
Bahamas80917
Barbados76866
Belize75881116
Bermuda7484 15
Cancun7791914
Cayman Islands7391820
Costa Rica627813
Cozumel7589915
Curaçao80912
Dominica758712
Dominican Rep7688410
Havana7588610
Guadeloupe74899
Jamaica7488512
San Juan7689513
St Lucia7788820
St. Maarten80896
St. Thomas78905
Trinidad7490816
Despite their lower risk of rain, the ABC islands may experience higher than normal cloud cover from storms in the region.

However, the ABC islands are not totally immune to bad weather. Storms and hurricanes do occasionally pass in their vicinity, making them subject to brief heavy rains.

The high risk of rain means tourism reaches a low point in the Caribbean, but it also means prices are lower. Anyone thinking of taking advantage of the price drop should consider travel insurance.

Crowds also are smaller because because children have gone back to school, which cuts down family vacations.

The only other major destination with a moderate amount of rain is Punta Cana in Dominican Republic with an average of four inches.

Destinations with some of the highest amount of rain are ports of call for western Caribbean cruises, which cruise lines rarely offer during the month.

Cancun, Cayman Islands, Cozumel, Belize and Costa Rica all average nine inches or more. Costa Rica hits a high point for the year at 13 inches.

Cayman Islands and St. Lucia average 20 days of rain during the month or two out of every three days.

Temperatures in September


Temperatures stay quite warm during the month despite the arrival of fall. They usually stay close to August temperatures and don’t start to drop until October.

Bahamas, Cancun, Cayman Islands, Curacao, St. Thomas and Trinidad all maintain an average high temperature during the day of 90 degrees Fahrenheit or low 30s Celsius.

Most other destinations maintain average highs in the upper 80s Fahrenheit or about 30 Celsius.

Water temperatures are normally comfortable enough for swimming during this time of year.


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