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Historical averages and packing recommendations for your September visit to St. Maarten / St. Martin.
"Peak hurricane risk"
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St. Maarten/St. Martin is split down the middle: the Dutch territory of Sint Maarten to the south, the French collectivity of Saint-Martin to the north, two countries on one small island. Cruise passengers dock in Philipsburg on the Dutch side, minutes from beach clubs, duty-free shops, and Maho Beach, where jets clear the sand by a few feet on their approach to the airport. Cross into Marigot on the French side for the food.
St. Maarten / St. Martin in September is warm and sunny, with average highs around 89°F and lows that rarely dip below 78°F. September sees roughly 15 rainy days, so waterproof layers and flexible plans are wise. Showers are often short-lived but can be intense. Peak hurricane risk
It's the shoulder season in St. Maarten / St. Martin: fewer crowds than the winter peak, but the heat and humidity are at their highest. A light rain jacket and early-morning excursions will serve you well. Pack reef-safe SPF 50+ sunscreen, a hat, and breathable fabrics. The sun at 89°F is intense, especially near the water.
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The average high temperature in St. Maarten / St. Martin during September is 89°F, with a low of 78°F.
St. Maarten / St. Martin typically sees 15 days of rain in September. Peak hurricane risk
For a September cruise to St. Maarten / St. Martin, you should pack lightweight, breathable clothing, swimwear, and sun protection.