Orient Bay Weather in September

Orient Bay 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 in September

Climate statistics over the past 30 years suggest around 19 days of rain, with 134 mm (5.3 in) average for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Orient Bay in September

Daytime temperatures in Orient Bay reach 30°C (86°F) in September, dropping to 27°C (81°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. 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 Orient Bay in September

The city usually sees around 232 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Orient Bay in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

With water at 29°C (84°F), conditions are warm and calm. Perfect for those who like tropical water temperatures, though it won't cool you down much.

September in Orient Bay can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, 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's climate page.

Orient Bay 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 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 in September

Browse day-by-day weather records for Orient Bay 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 historical weather extremes in September

Based on 35 years of weather observations (1990-2025), these are the most extreme conditions recorded in Orient Bay.

• The warmest day in September was on September 1, 2016, with a maximum of 39°C (102°F).
• The lowest daytime temperature in September was 27°C (81°F), recorded on September 4, 2009.
• The lowest overnight temperature recorded in September was 21°C (70°F) (September 8, 2012).

What to Wear in Orient Bay in September

Warm but pleasant conditions in Orient Bay in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. 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 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's climate page.

More climate data for Orient Bay

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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