Curaçao (Willemstad) weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: January – September
What is the weather like in Curaçao (Willemstad) in September?
In September, Curaçao (Willemstad) is hot: daytime highs average 29 °C, and even at night it stays warm at around 27 °C. The sea averages 29.0 °C – almost as warm as a bath. The sun shines for around 9 hours a day. Rain is frequent, with about 13 rainy days and 60 mm in total. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. It is often windy, with gusts of around 32 km/h. All in all, September is an excellent month for a holiday in Curaçao (Willemstad).
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 88 | 86 | 75 |
| Day | 29° | 29° | 29° |
| Night | 27° | 27° | 27° |
| Sea | 29° | 29° | 29° |
| Sun | 10 h | 9 h | 8 h |
| Rain days | 12 | 13 | 21 |
More details for September
- Daylight
- 12 h 13 min06:25 – 18:37
- UV index
- 13 · extremeclear sky, noon (estimate)
- Muggy days
- 30 daysdew point 18 °C or more
- Wind
- 32 km/haverage daily peak
- Cloud cover
- 63 %on average
- Hot days
- 7 days30 °C or more
- Time zone
- UTC−4America/Curacao
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %97 %
- Few rainy daysweight 20 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
- Windproof jacket
Curaçao (Willemstad) in September: quick answers
Is Curaçao (Willemstad) hot in September?
Yes. In September, Curaçao (Willemstad) is hot: daytime highs average 29 °C and nights stay around 27 °C. On about 7 days the thermometer climbs to 30 °C or more.
Can you swim in Curaçao (Willemstad) in September?
Yes. In September the sea averages 29.0 °C – almost as warm as a bath.
Does it rain much in Curaçao (Willemstad) in September?
Rain is frequent, with about 13 rainy days and 60 mm in total.
Curaçao (Willemstad) month by month
The whole year in Curaçao (Willemstad)All destinations: Curaçao
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)