As it’s located in the South of Vietnam in the range of tropical climate, Phu Quoc has 2 main seasons: Rainy and Dry season.
As usual, Dry season lasts from October to the end of April, and the rest of the year is the rainy time. The best time to visit Phu Quoc is the dry season but the beginning of the rainy season or summer time which starts from May to July is still pretty good with many days of sunny, calm and warm sea, it is not persistant rain like many people think, number of sunny days last 20 to 25 days within the month. Indeed, rainy season or summer time is one of the best time to explore coral reefs in South Phu Quoc Island.