Baie Nettle Weather in September

September in Baie Nettle 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 Baie Nettle in September

Expect around 19 days of rain based on historical data, with 134 mm (5.3 in) average. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Baie Nettle in September

In September, Baie Nettle sees high temperatures, with highs of 30°C (86°F). Nights drop to around 27°C (81°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.

Sunshine in Baie Nettle in September

The days are predominantly sunny, with an estimated total of around 232 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Baie Nettle 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 is 29°C (84°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.

September in Baie Nettle has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations 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 Baie Nettle's climate page.

Baie Nettle 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 Baie Nettle 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 Baie Nettle in September

Browse day-by-day weather records for Baie Nettle 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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Baie Nettle historical weather extremes in September

Based on weather observations in Baie Nettle between 1990 and 2025, these are the recorded extremes during September.

• The hottest September day on record in Baie Nettle reached 37°C (99°F) (September 3, 1992).
• On September 21, 2008, Baie Nettle saw its coldest September day with temperatures maxing out at 27°C (81°F).
• The lowest overnight temperature recorded in September was 21°C (70°F) (September 29, 2017).

What to Wear in Baie Nettle 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 Baie Nettle 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 Baie Nettle's climate page.

More climate data for Baie Nettle

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Baie Nettle climate overview or explore weather in Saint Martin.