Cupecoy Weather in September
September in Cupecoy brings high temperatures, with highs of 30°C (86°F) and nights dropping to 27°C (81°F). Rainfall is on the higher side this month, averaging around 134 mm (5.3 in), so keep a rain jacket handy.
Rainfall in Cupecoy in September
The climate data from previous years indicates about 19 days of rain, averaging 134 mm (5.3 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Cupecoy in September
September in Cupecoy brings typical temperatures with highs around 30°C (86°F) and lows of 27°C (81°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. 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 Cupecoy in September
The city usually sees around 232 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in Cupecoy 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
At 29°C (84°F), the water is very warm — more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.September in Cupecoy has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
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 Cupecoy's climate page.
Cupecoy 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 Cupecoy 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 Cupecoy in September
Browse day-by-day weather records for Cupecoy spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cupecoy historical weather extremes in September
According to our 35 years of weather records for Cupecoy, the following extremes were recorded between 1990 and 2025.
- On September 3, 1992, temperatures climbed to 37°C (99°F), marking the warmest September day on record.
- The coldest September day was on September 4, 2009, with a maximum of 27°C (81°F).
- Cupecoy 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 →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Cupecoy in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Cupecoy 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 Cupecoy's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Cupecoy climate overview or explore weather in Sint Maarten.
