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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.
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.
Pick a month to see the average temperature, rainfall and sunshine in Orient Bay - and find the best time to visit.
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).
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.
Based on 35 years of weather observations (1990-2025), these are the most extreme conditions recorded in Orient Bay.
Find out more about the weather in Saint Martin and which places have the best travel conditions in this month. See all of Saint Martin in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Orient Bay climate overview or explore weather in Saint Martin.
Where to go in September - average daytime high across popular destinations.
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