Weather in Barbados in September

How September compares

September is the 1st warmest month of the year in Barbados and ranks 39th of 134 destinations we compare for September - see where else is hot in September. Against London's average high of 18.6°C in September, Barbados is 10.1°C warmer by day and 14.9°C warmer at night.

Daytime and night-time in September

The typical September day in Barbados peaks at 28.7°C, but that is an average: the warmest 10% of days reach 29.6°C or more. About 100% of days top 25°C and 1 in 12 pass 30°C. Nights average 26.1°C; one night in ten drops to 25.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 32.6°C (2019-09-12) and the coldest night 23.9°C (2017-09-04).

Rain in September

Wet (more than 8 rainy days): about 19 days with 1 mm or more, 126 mm in total. Year to year it varies a lot - the wettest September was 2010 with 230 mm, the driest 2015 with 59 mm. Humidity averages 80%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in September

The sea averages 29.0°C - warm enough to swim (22°c+). Depending on the year it ranges from 28.4°C to 29.6°C. This is the warmest the sea gets here all year.

Sunshine and daylight

Around 4.9 hours of sunshine a day (estimated from cloud cover), 12.1 hours of daylight: the sun rises about 05:48 and sets about 18:00 local time in mid-September. Average cloud cover is 59%.

Is September a good time to visit Barbados?

It is a reasonable choice: hot days but expect showers. The best months for Barbados on our scoring are February, March, April; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Hot days, with little cooling after dark

September ranks as Barbados's warmest month, but the humidity deserves as much attention as the temperature. With humidity at 80%, allow for sticky conditions rather than expecting dry heat. Average night-time lows sit around 26°C, so evenings are still warm enough for light clothing; a cool-down after sunset is not something to rely on. Pack loose, breathable clothes and check that your accommodation has cooling you will be comfortable with overnight. Keep strenuous outdoor plans away from midday and leave room for shade and rest. This month suits people who enjoy sustained warmth more than those who need cooler evenings to feel comfortable.

Plan around rain rather than expecting clear skies

Rain is the main compromise in September. About 19 days receive measurable rain, so it makes sense to allow flexibility throughout the trip rather than treating wet weather as an unlikely interruption. That figure does not mean those days are complete washouts, but it does make a fixed schedule of outdoor plans less appealing. Sunshine averages about 4.9 hours within 12.1 hours of daylight, leaving plenty of daylight that is not necessarily sunny. Take a light waterproof and give yourself sheltered alternatives when rain arrives. If reliable sunshine is your main reason for travelling, September is a less convincing choice than its warm air and sea might initially suggest.