The cheapest time to visit St. Martin (the Dutch/French island) is during the "Low Season," which typically runs from late May to mid-November. This period coincides with the Atlantic hurricane season and the humid summer months, leading to a significant drop in tourism and, consequently, lower prices for accommodation and flights. September and October are generally the absolute cheapest months, with many luxury resorts offering discounts of 30% to 50% compared to the peak winter rates. However, travelers should be aware that some smaller restaurants and boutique shops may close during this time for their own vacations or renovations. If you want a balance between lower costs and better weather, the "Shoulder Season" in late April and May is an excellent choice; the winter crowds have dispersed, the weather remains pleasant, and hotel rates begin their seasonal descent. While visiting during the low season carries a slight risk of rain or storms, it provides a much more tranquil experience at the island's famous 37 beaches. Booking at least two to three months in advance for a summer trip can yield some of the best "all-inclusive" deals found anywhere in the Caribbean.