Weather in Seychelles in September

How September compares

September is the 10th warmest month of the year in Seychelles and ranks 76th 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, Seychelles is 7.7°C warmer by day and 13.9°C warmer at night.

Daytime and night-time in September

The typical September day in Seychelles peaks at 26.3°C, but that is an average: the warmest 10% of days reach 27.0°C or more. About 100% of days top 25°C. Nights average 25.1°C; one night in ten drops to 24.4°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 28.2°C (2012-09-26) and the coldest night 23.4°C (2005-09-05).

Rain in September

Wet (more than 8 rainy days): about 16 days with 1 mm or more, 118 mm in total. Year to year it varies a lot - the wettest September was 1997 with 279 mm, the driest 2001 with 20 mm. Humidity averages 82%.

Sea temperature in September

The sea averages 27.0°C - warm enough to swim (22°c+). Depending on the year it ranges from 26.4°C to 27.5°C. For the warmest sea here, come in April (29.8°C).

Sunshine and daylight

Around 4.5 hours of sunshine a day (estimated from cloud cover), 12.0 hours of daylight: the sun rises about 06:11 and sets about 18:16 local time in mid-September. Average cloud cover is 63%.

Is September a good time to visit Seychelles?

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

Warm days, sticky evenings

September feels distinctly warmer than home: London's average daytime high is 18.6°C, compared with 26.3°C in Seychelles. That is comfortable territory for spending time outdoors, but the 82% humidity means it can feel stickier than the temperature suggests. Loose, breathable clothing makes more sense than heavy fabrics, and it is sensible to take things gently at midday if you dislike humid heat. Nights average 25.1°C, so do not expect the evening to bring much cooling. Choose accommodation with cooling in mind, and pack mainly for warmth rather than assuming you will need the layers you would use during a British September evening.

Leave room for rain in your plans

The main compromise is wet weather, not a lack of warmth. With about 16 rainy days, rain is something to plan around rather than treat as an unlikely interruption. That does not mean every wet day is a write-off, but there is no basis for counting on rain falling only at convenient times. Sunshine averages about 4.5 hours within 12 hours of daylight, so long daylight hours do not translate into uninterrupted sun. Keep outdoor plans movable, bring lightweight rain protection and protect anything that needs to stay dry. If your priority is clear skies throughout a beach holiday, September is a less convincing fit.