The wettest months on the island are from July to November. There are 145 days of rain a year on average and it rains usually the most in November (15 days). However, December, May and June are the transition months from dry to wet season.

The rainiest month in St. Maarten/St. Martin is typically November, which falls at the tail end of the Atlantic hurricane season. During this month, the island receives an average of about 5 to 6 inches (130-150mm) of rainfall. This precipitation often comes in the form of short, intense tropical downpours followed by clear skies, rather than prolonged days of gray drizzle. September and October are also quite wet, but November often sees a peak in "tropical waves" that bring moisture across the Caribbean. For travelers in 2026, visiting during the rainiest month can offer "lush" scenery and significantly lower hotel prices, but it also carries a higher risk of outdoor plans being interrupted by the weather. In contrast, the driest period occurs between February and March. If you are planning a trip in November, it is wise to pack a lightweight, breathable rain jacket and remain flexible with your itinerary, perhaps planning "indoor" activities like visiting the duty-free shops in Philipsburg or the gourmet restaurants in Grand Case during the afternoon showers.