Rambutan fruit are typically in season in the late spring and fall. However, this will vary depending on the region. In some regions, the rambutan trees will fruit only once per year and in others twice per year. According to the International Tropical Fruits Network, the fruit generally has two seasons in Malaysia and Thailand, firstly in June, and secondly in December. In the Philippines, the rambutan fruit is in season between July and October (36).