Orient Bay French St Martin Weather in September

Orient Bay French St Martin in September sees high temperatures, with highs around 30°C (86°F) and overnight lows of 27°C (81°F). Rainfall is fairly high at around 134 mm (5.3 in) on average, so pack waterproofs just in case.

Rainfall in Orient Bay French St Martin in September

Typically, you can expect about 19 days of rain this month, with 134 mm (5.3 in) on average. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Orient Bay French St Martin in September

Expect highs of 30°C (86°F) in Orient Bay French St Martin in September, with nights dropping to around 27°C (81°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.

Sunshine in Orient Bay French St Martin in September

Expect sunny days throughout the month, with an estimated 232 hours of sunshine. This makes it a pleasant time to visit Orient Bay French St Martin.

Wind Speed in Orient Bay French St Martin in September

Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in September

At 29°C (84°F), the water feels bath-warm. Fine for swimming, but those looking for a cooling swim may be a bit disappointed.

September in Orient Bay French St Martin 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.

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For a detailed overview over the year and the best time to visit Saint Martin, check out our Orient Bay French St Martin's climate page.

Orient Bay French St Martin 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% *  

* Data from: Sint Maarten, Sint Maarten (10 KM, 6 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Orient Bay French St Martin 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

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Historical weather for Orient Bay French St Martin in September

Browse day-by-day weather records for Orient Bay French St Martin spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Orient Bay French St Martin historical weather extremes in September

Based on 35 years of weather observations in Orient Bay French St Martin between 1990 and 2025, these are the recorded extremes.

• On September 1, 2016, temperatures climbed to 39°C (102°F), marking the warmest September day on record.
• The lowest daytime temperature in September was 27°C (81°F), recorded on September 4, 2009.
• Nighttime temperatures dropped to 21°C (70°F) on September 8, 2012, marking the coldest September night on record.

What to Wear in Orient Bay French St Martin 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. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Orient Bay French St Martin in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Saint Martin, check out our Orient Bay French St Martin's climate page.

More climate data for Orient Bay French St Martin

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Orient Bay French St Martin climate overview or explore weather in Saint Martin.