The Best Time to Visit Phu Quoc: What the Rainfall Record Actually Says
7 min read
Come between December and March. Those are the four months the island’s own rainfall record shows as genuinely dry, and they are also the months when the sea is flat enough for the boats that most of Phu Quoc’s days out depend on. If the water is the reason you are coming, the 4 Island & 2 Reefs Snorkeling Tour by Speedboat is the dry-season day to book: €56.65, six hours, 4.8 stars from 461 reviews. If your weeks fall in the wet half of the year, May to October, build the trip on land and keep one water day booked with free cancellation.
See prices and dates for the 4 Island & 2 Reefs snorkelling day
Almost every guide to Phu Quoc gives the dry season as November to April. That is not wrong so much as generous at both ends, and the difference between the generous version and the measured one is the difference between a good week and a wet one.
Here is what the island’s own rainfall record shows, month by month, in millimetres:
| Month | Rainfall |
|---|---|
| January | 27.7 mm |
| February | 27.2 mm |
| March | 61.0 mm |
| April | 148.2 mm |
| May | 280.8 mm |
| June | 381.9 mm |
| July | 419.2 mm |
| August | 485.6 mm |
| September | 473.6 mm |
| October | 354.2 mm |
| November | 163.5 mm |
| December | 59.1 mm |
The column adds up to about 2,880 mm a year – other sources put the island’s annual total nearer 3,000 mm – and the shape of it matters more than the total: the six months from May to October carry about five sixths of the rain. The hills in the north of the island are wetter still, with figures up to 4,000 mm.
Four dry months, two in-between months, six wet ones
Read the column and the season sorts itself out. December, January, February and March are the genuinely dry months. January and February are close to arid at under 30 mm.
April and November are the shoulder months, and they are the ones the brochure quietly rounds into the dry season. April carries 148.2 mm and November 163.5 mm – five or six times a January. You will still get plenty of sun in both, and you will also get afternoons that shut the sea down.
May through October is the southwest monsoon, and August and September are its peak at 485.6 mm and 473.6 mm. That is not drizzle; it is tropical rain in bursts, often with several clear hours around it.
The temperature is not a variable, so stop planning around it
This is the part that surprises people who are used to choosing a month by how warm it will be. Phu Quoc’s average daily highs run from 29.5 °C in September to 32.5 °C in April – a spread of three degrees across the whole year. Overnight lows sit between 23.0 °C and 25.8 °C. The sea stays somewhere around 26 to 30 °C throughout.
So there is no cool season and no hot season worth the name. April and May are the hottest and also the most humid-feeling; September is nominally the coolest and it is the month you are most likely to spend indoors. Choosing by temperature on this island tells you nothing. Choose by rainfall and sea state.
What each season actually does to your bookings
The reason any of this matters is that most of what Phu Quoc sells happens on the water.
December to March. Flat seas and the best visibility. Operators put dry-season underwater visibility in the 10 to 20 metre range, which is when the snorkelling boats and the beginner dive trips are worth what they cost. The island-hopping category – 138 offers from €7.81 – runs at full strength, and the starfish on the north coast are only reliably visible in these clear months.
July to September. The months when trips get cancelled. Free cancellation is not a courtesy in this window, it is the thing you are buying; check that it is on the booking page rather than assuming.
April, May, October, November. Perfectly viable, and noticeably cheaper. Rain here tends to arrive in the afternoon, which makes a morning departure worth more than it is in January. If a tour offers a choice of start times in these months, take the early one.
One seasonal quirk worth knowing: the squid fishing boats, 36 offers from €15.15, advertise the sunset as seasonal rather than guaranteed – the booking pages say so themselves, and in the wet half of the year that is the honest description. The sunset cruise category holds 82 offers from €5.45, and the same caveat applies to all of them. Sunset here falls between roughly half past five and half past six depending on the month; this is ten degrees north of the equator, so the light goes quickly.
Five days out, and the months they suit
| Tour | Duration | From | Rating | Suits |
|---|---|---|---|---|
| 4 Island & 2 Reefs Snorkeling Tour by Speedboat | 6 hours | €56.65 | 4.8 stars, 461 reviews | Snorkellers and first-time visitors, December to March |
| 3-Island Adventure Guided Boat Tour | 8 hours | €32.52 | 4.0 stars, 801 reviews | Travellers on a budget who still want a full day afloat |
| Kayaking with Starfish Beach and Bee Farm Tour | 8 hours | €42.76 | 4.5 stars, 321 reviews | Families, and anyone heading for the north coast in the clear months |
| Tien Son Dinh 6-Hour Jungle Trekking Adventure | 6 hours | €60.28 | 4.9 stars, 194 reviews | Walkers, and anyone whose only free weeks fall in the wet months |
| Street Food Tour | 3h 30m | €51.67 | 4.9 stars, 100 reviews | Couples and solo travellers with one free evening, any month |
The cheap full day afloat is the one to understand before you book it: at €32.52 for eight hours it uses a tourism boat rather than a speedboat, with lunch on board, and 4.0 stars from 801 reviews is a fair sample for a shared boat day. A notice on the page says rough waves currently move the May Rut Trong stop to Xuong Island until further notice.
See prices and dates for the 3-Island Adventure boat day
And if your weeks land in the monsoon, the forest is the answer rather than the sea. The Tien Son Dinh trek is six hours on foot, €60.28, and the page calls it challenging: it is not suitable for children under 6, pregnant women, or people with heart problems, mobility impairments or a low level of fitness.
Check availability for the Tien Son Dinh jungle trek
The crowd calendar is not the weather calendar
The four dry months are also the expensive, busy ones, and one date inside them is in a class of its own. Tet, the lunar new year, falls on 6 February 2027. The national holiday runs about a week around it, with the exact dates announced by the government each year.
Tet lands in the middle of the driest, calmest stretch of the year. That means the best possible conditions, domestic visitors from the whole country, full hotels and peak prices, all at once. If you are going anyway, book boats and the cable car day well ahead; if you are flexible, the two weeks either side of Tet give you the same weather without the crush.
Our recommendation
For most people: come between December and March and put one good snorkelling day at the centre of the trip. The 4 Island & 2 Reefs Snorkeling Tour by Speedboat at €56.65 is the one we would book, and the prices you pay for the hotel in those months are the trade you are making.
On a small budget: travel in late April, May, October or November, book mornings, and take the 3-Island Adventure Guided Boat Tour at €32.52. Rain here tends to come in the afternoon, so an early departure is worth more in those months than it is in January.
With children: the clear months again, and the north coast rather than the open sea – the Kayaking with Starfish Beach and Bee Farm Tour is calm water and an eight-hour day with things to look at between the stops. The page rules out babies under 1 year and wheelchair users, the bee farm stop is closed on Wednesdays, and in bad weather Rach Vem is swapped for Ganh Dau beach; free pickup covers the Duong Dong area only.
If July, August or September are the only weeks you have: come anyway, but build the trip differently. One water day booked with free cancellation and moved when the forecast allows, the Tien Son Dinh jungle trek for a day that does not depend on the sea at all, and the Street Food Tour for one of the evenings.
Who should skip the snorkelling day: anyone who gets seasick easily and anyone travelling in August or September. Six hours on a speedboat in monsoon swell is not the trip the photographs show, and 485.6 mm in August is a reason to plan around the water rather than a reason to stay home.
