Phu Quoc in September: weather, sea and what to know
September on Phu Quoc is the height of the rainy season: about 474 mm over 23 rainy days by the weather station averages, with little sunshine — about 138 hours a month. Highs are around 29.5 °C and the water about 29 °C.
September on Phu Quoc is the height of the rainy season: about 474 mm over 23 rainy days by the weather station averages, with little sunshine — about 138 hours a month. Highs are around 29.5 °C and the water about 29 °C. The southwest wind brings waves to the west coast, while the south of the island, such as Khem beach, is usually better sheltered. Boats and ferries from the mainland may not run in a storm, so keep a spare day.
What is the weather like on Phu Quoc in September?
| Day | Night | Rain | Rainy days | Sunshine | Sea |
|---|---|---|---|---|---|
| 29.5 °C | 25 °C | 474 mm | 23 | 138 h | 29 °C |
"Day" is the average daily high, "night" the average nightly low. Averages from QCVN 02:2022/BXD; sea temperature from climate references.
Where to swim on Phu Quoc in September?
During the southwest wind season the west-coast beaches, often have waves (Thanh Niên). The south of the island is better sheltered than Bai Truong (Long Beach) (VnExpress), and Vietnam Airlines describes Sao and Khem beaches as sheltered from the southwest monsoon. Swim where it is calm and stay out under a red flag. Beaches around the island — Phu Quoc beaches.
Can you swim on Phu Quoc in September?
Yes, but the west coast can have waves — the south of the island, for example Khem beach, is calmer. Stay out under a red flag. Beaches — Phu Quoc beaches. Next: the month after — Phu Quoc in October; all months — Phu Quoc weather by month.
FAQ
What's the weather on Phu Quoc in September? Highs around 29.5 °C, nights around 25 °C, about 474 mm of rain over 23 rainy days.
How warm is the sea in September? About 29 °C.
Rainy or dry season? Rainy season: May to October.
Sources and checks
Weather — long-term averages from the Phu Quoc weather station (QCVN 02:2022/BXD, station No. 150). Sea temperature — weather2travel and Climates to Travel, checked 12 November 2026. Seasons — Vietnam's official tourism portal, VnExpress (10 April 2026), VnExpress International (16 October 2024); the sea on each side of the island — Thanh Niên (20 June 2024), Vietnam Airlines. Ferry suspensions — VOH (13 July 2024) and SGGP (27 September 2022). Advice is ours.