The dry season, December through March, is the best time to visit. Temperatures sit around 25–30°C, the humidity is manageable, and the sea is calm. This is also carnival season, with the main parade in the week before Mardi Gras (late February or early March, depending on the year).
The hurricane season runs from June to November, with the most active months being August through October. Heavy rain can wash out the road from Port-au-Prince. Even outside hurricane season, afternoon thunderstorms are common in summer.