Sint Maarten Weather in September
In Sint Maarten, September brings high daytime temperatures around 30°C (86°F), with nights cooling to 27°C (81°F). Expect quite a bit of rainfall this month.
Rainfall in Sint Maarten in September
Based on our climate data of the past 30 years, about 19 days of rain are anticipated, with 134 mm (5.3 in) on average. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Sint Maarten in September
In September, Sint Maarten gets high temperatures, with highs of 30°C (86°F). Nights cool to around 27°C (81°F). This kind of day-to-night contrast is typical for this time of year. Nights remain warm at around 27°C (81°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.
Sunshine in Sint Maarten in September
Enjoy a sunny month with about 232 hours of sunshine, the clear skies make Sint Maarten even more beautiful.
Wind Speed in Sint Maarten in September
Wind speeds average 5 m/s (10 knots) during September. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.
Average water temperature in September
The water reaches 29°C (84°F) this month. It's on the warm side, which suits people who prefer that, but don't expect a cooling dip if the air temperature is also high.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Sint Maarten. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sint Maarten, check out our Sint Maarten's climate page.
Sint Maarten Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Water Temperature
29°C (84°F)
Chance of Rain
62%
Precipitation
134 mm (5.3 in)
Rainy days
19 days
Humidity
78%
Windspeed
5 m/s (10 knots)
Sunshine
232 hours
Percentage Sunshine
61%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sint Maarten typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 27°C (81°F).
Average temperatures in September
Historical weather for Sint Maarten in September
Browse day-by-day weather records for Sint Maarten spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sint Maarten historical weather extremes in September
Based on 35 years of weather observations in Sint Maarten between 1990 and 2025, these are the recorded extremes.
- Sint Maarten recorded its highest September temperature of 37°C (99°F) on September 3, 1992.
- The coldest September day was on September 4, 2009, with a maximum of 27°C (81°F).
- Sint Maarten registered its coldest September night on September 29, 2017, with temperatures dropping to 21°C (70°F).
Best Places in Sint Maarten in September
Find out more about the weather in Sint Maarten and which places have the best travel conditions in this month. See all of Sint Maarten in September →
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What to Wear in Sint Maarten in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Sint Maarten in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sint Maarten, check out our Sint Maarten's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Sint Maarten climate overview or explore weather in Sint Maarten.
