Cumbuco is close to the equator and has two distinct seasons. The dry season runs roughly from July to January — this is when the trade winds are strongest and most reliable, the skies are clear, and the beach is at its most inviting. August to November is the peak kitesurfing season, when conditions are consistently excellent. The wet season runs from February to June, with heavy rain especially in March and April; the wind drops and kitesurfing becomes less reliable, though still possible on good days.
Year-round water temperature is 22–25°C. The village can be busy with Brazilian holidaymakers during school holidays, particularly in July and at Carnival. Outside of those periods it is quiet enough that you will have the beach largely to yourself.