December is the first full month of Phu Quoc's dry season and one of the best weather months of the year on the island. Expect daytime highs of 86°–88°F (30°–31°C), overnight lows of 76°–79°F (24°–26°C), roughly 8.4 hours of sunshine per day and only about 48 mm of rain spread over 8–9 rainy days. The trade-off is that December is officially high season: crowd levels are rated High and prices are rated High, peaking between Christmas and New Year.
What Is Phu Quoc's Weather Actually Like in December?
December behaves like the opening act of the dry season rather than a transition month. The southwest monsoon that dumps rain on Phu Quoc from June through October has already flipped, and the northeast monsoon that replaces it pushes dry, stable air across the Gulf of Thailand. The result is the pattern most visitors picture when they imagine the island: bright mornings, long sunny afternoons, and a breeze that keeps the heat manageable.
Daytime highs sit at 86°–88°F (30°–31°C) and overnight lows at 76°–79°F (24°–26°C), for a monthly average of about 27.3°C. Typical daily readings fall in the 26°C to 29°C band. Humidity is markedly lower than in the wet season, which is why 31°C in December feels considerably easier to handle than 31°C in August. The island logs roughly 8.4 hours of sunshine per day, and the sea stays at about 27°–28°C — warm enough for a 6 a.m. swim or a night swim without a wetsuit.
Daylight is stable and predictable. Sunrise lands around 6:10–6:20 and sunset around 17:45–18:00, and the tropics do not do long dusk: by 18:15 it is fully dark. If you are planning a sunset boat trip, a beach dinner or a motorbike ride back from the far north of the island, build your day around that 17:50 cutoff rather than assuming you have until 19:00.
The wind is the one variable worth understanding. The northeast monsoon produces a steady 10–20 km/h breeze, stronger on exposed headlands and on the east-facing side of the island. That breeze is a gift on a hot afternoon and a nuisance only if you have booked a specific east-coast boat trip on a windy day — more on that in the beach section below.
How Much Rain Does Phu Quoc Really Get in December?
This is where published December guides disagree, and the honest answer is that the range is wide. Climate averages, short-range forecasts and long-range models count rain differently — some count any measurable trace, others count only days where rain actually disrupts plans. Here is how the main figures compare:
| Source type | Rainy days | Rainfall |
|---|---|---|
| Long-range forecast model (December 2026) | ~20 days | 65.8 mm |
| Short-range December forecast | 3–8 days | Not specified |
| December travel guide average | 8–9 days | 48 mm to just over 104 mm |
| Climate average cited by another guide | — | 48.0 mm |
| Average temperature across sources | — | 26°C to 29°C |
The 20-day figure sounds alarming until you understand what it is measuring. A day with 0.5 mm of rain at 4 a.m. counts as a rainy day in a long-range model and counts as a completely dry day in your holiday. The 8–9 day figure from climate averages is closer to lived experience, and the 3–8 day short-range forecast reflects what actually happens on the ground in a typical December.
What matters more than the count is the shape of the rain. December showers on Phu Quoc are short and heavy rather than long and grey. A typical wet day looks like this: clear morning, building cloud through early afternoon, a 20–60 minute downpour somewhere between 14:00 and 18:00, then clearing skies for sunset. Multi-day washouts are rare in December and are far more characteristic of September and October.
Practical tip: Do your boat trips, snorkelling and cable car rides in the morning. December afternoons carry the highest chance of a shower, and morning sea conditions are also the calmest of the day.
December vs January in Phu Quoc: Which Month Should You Book?
Both months are in the dry season and both are excellent. January is widely described as one of the best months to visit Phu Quoc — dry, sunny and ideal for swimming, sightseeing, snorkelling and diving — but the differences between the two months are smaller than most guides suggest.
| Metric | December | January |
|---|---|---|
| Average temperature | ~27.3°C | ~27.1°C |
| Typical temperature range | 26°C–29°C (highs 30°–31°C) | 25.6°C–28.4°C |
| Rainfall | ~48 mm | ~51.2 mm |
| Rainy days | 8–9 | ~8.7 |
| Daily sunshine | ~8.4 hours | 10–11 hours |
| Crowds and prices | High (peak Dec 20–Jan 3) | High through early January, easing mid-month |
On paper the two months are nearly identical for rain and temperature. The real difference is sunshine: January delivers around 10–11 hours per day against December's 8.4, and January is consistently described as drier and sunnier than the month before it. If your priority is the maximum possible number of cloudless beach days, January has a slight edge.
December wins on atmosphere. The December-to-February peak season is described as unbeatable for travellers chasing resorts, yacht charters and private island tours, and December specifically brings the holiday mood — Christmas lights along Tran Hung Dao, New Year's Eve beach parties, and a full calendar of events. It also has a practical advantage: early December is one of the few windows where you get dry-season weather without peak-season pricing.
Who this is not ideal for: if you are travelling on a tight budget, hate crowds, or want genuinely empty beaches, neither December nor January is your month — both are high season. Consider late April, May or early November instead, when the weather is still good and rates drop sharply. Likewise, if you specifically want the single driest, sunniest stretch of the year, book January rather than December.
What December Weather Means for Beaches, Boats and Island Hopping
The northeast monsoon dictates which side of Phu Quoc you should spend your days on. The west coast — Long Beach (Bai Truong), Ong Lang, Cua Can and Ganh Dau — sits in the lee of the wind and gets the calm, clear water that makes December famous. This is where you want to base yourself for swimming, paddleboarding and sunset dinners.
The east and southeast coast — Bai Vong, Sao Beach and Khem Beach — takes the onshore breeze directly. Sao Beach is still one of the most photographed beaches in Vietnam and absolutely worth a visit, but in December it can be choppier and breezier than the west coast. Go in the morning, before the wind builds, and you will get the postcard version.
Island hopping and diving are at their best. Dry-season visibility in the An Thoi archipelago typically runs 10–20 metres, which is why December and January are the peak months for scuba diving and snorkelling trips out of An Thoi port. The Hon Thom cable car — at 7.9 km, the longest over-sea cable car in the world — runs a roughly 15-minute crossing to Hon Thom island and is far more pleasant in December's clear air than in the haze of the wet season.
December activity checklist:
- Sunrise swim on Long Beach — water around 27°–28°C, beach nearly empty before 7:00.
- Morning snorkelling or diving from An Thoi — book the 8:00–9:00 departures for the calmest sea.
- Hon Thom cable car — go before 11:00 to beat both the cloud build-up and the tour groups.
- Sao Beach — arrive by 9:00, leave by 13:00.
- Sunset at Dinh Cau or anywhere along Long Beach — be in position by 17:30.
- Phu Quoc Night Market in Duong Dong — the natural fallback on the occasional wet evening.
For the handful of genuinely rainy afternoons December throws at you, the island has decent cover: the night market, the pearl farms in the north, the fish sauce factories near Duong Dong, VinWonders and Grand World in the north, plus the usual spa and cooking-class options. A December shower rarely lasts long enough to ruin a full day.
Crowds, Prices and Booking: December Is High Season on Phu Quoc
December is rated High for both crowd level and price level, and the peak is concentrated rather than spread evenly. The first two weeks of the month are busy but manageable. From roughly December 20 to January 3, the island fills up with holiday travellers, and flights, resorts and boat trips all hit their annual maximum.
Practically, that means booking early. For the Christmas–New Year window, resorts and flights are typically best secured two to three months ahead, and the best-value rooms at mid-range beachfront properties on Long Beach and Ong Lang often sell out before that. If you are renting a motorbike, book it one to two days ahead rather than assuming you can walk in and ride away — during the peak week, automatic scooters in particular get thin on the ground.
If your dates are flexible, the single best move is to shift your trip to December 1–15. You get the same dry-season weather, the same 8.4 hours of daily sunshine and the same calm west-coast water, but accommodation rates and availability are considerably friendlier. A close second is arriving on January 4 or later, once the New Year crowd has flown home.
Money-saving note: December rainfall is not the reason prices are high — demand is. The weather difference between December 5 and December 28 is negligible, but the price difference is not.
Who December in Phu Quoc Suits — and Who It Doesn't
A great fit if you...
- Want dry-season weather with 86°–88°F highs and around 8.4 hours of daily sun.
- Are travelling as a couple, family or group and want resorts, yacht charters and private island tours at their operational best.
- Enjoy festive-season atmosphere, Christmas lights and New Year's Eve events.
- Plan to dive or snorkel — December is prime visibility season in the An Thoi archipelago.
- Can book two to three months ahead and are comfortable with high-season rates.
Less suited if you...
- Are on a tight budget — December is rated High for price level, and the Dec 20–Jan 3 window is the most expensive of the year.
- Want empty beaches and quiet restaurants; both December and January are peak season.
- Are chasing the absolute maximum sunshine — January delivers 10–11 hours per day against December's 8.4.
- Dislike heat and humidity; 31°C highs are the norm, even if December humidity is lower than mid-year.
- Need guaranteed cloudless skies every single day — 8–9 rainy days is the realistic expectation, and some models forecast more.
Frequently Asked Questions
How hot is Phu Quoc in December?
Daytime highs run 86°–88°F (30°–31°C) and overnight lows 76°–79°F (24°–26°C), with a monthly average of about 27.3°C. Typical daily readings fall between 26°C and 29°C. Humidity is lower than in the wet season, so the heat feels more manageable than the same temperature in August.
Does it rain a lot in Phu Quoc in December?
No. Most climate averages put December at roughly 48 mm of rain over 8–9 rainy days, with one guide citing a range of 48 mm to just over 104 mm. Short-range forecasts suggest only 3–8 rainy days. Some long-range models show 65.8 mm over as many as 20 days, but that counts brief overnight traces. Showers are usually short and heavy, lasting 20–60 minutes.
Is December a good time to visit Phu Quoc?
Yes — it is one of the best months weatherwise. December brings mostly sunny days, low humidity, minimal rainfall and around 8.4 hours of sunshine per day. The trade-off is that it is high season, with crowd levels and price levels both rated High, peaking from about December 20 to January 3.
Is December or January better for Phu Quoc?
They are close. December averages about 27.3°C with ~48 mm of rain over 8–9 days; January averages about 27.1°C with ~51.2 mm over ~8.7 days. January wins on sunshine with 10–11 hours per day versus December's 8.4. December wins on festive atmosphere. For value, choose December 1–15.
Can you swim in the sea in Phu Quoc in December?
Absolutely. Sea temperatures hold around 27°–28°C through December, warm enough to swim at any hour. The west-coast beaches — Long Beach, Ong Lang, Cua Can and Ganh Dau — are calmest because the northeast monsoon blows offshore there. East-facing beaches like Sao Beach can be choppier and breezier.
How busy is Phu Quoc in December?
Very. December is rated High for both crowds and prices, with the sharpest spike between roughly December 20 and January 3. Resorts and flights for that window are best booked two to three months in advance, and motorbike rentals should be reserved one to two days ahead rather than on arrival.
What should I pack for Phu Quoc in December?
Light breathable clothing, swimwear, reef-safe sunscreen, sunglasses, a hat and sandals cover most of it. Add a compact rain shell for the short afternoon showers, mosquito repellent for evenings, and a light long-sleeve layer for air-conditioned transfers. Bring a dry bag if you plan to ride a motorbike or take boat trips.
What time is sunset in Phu Quoc in December?
Sunset falls around 17:45–18:00 throughout December, with sunrise around 6:10–6:20. Darkness arrives quickly in the tropics — by about 18:15 it is fully dark — so plan beach dinners, sunset cruises and motorbike rides back from the north of the island around that 17:50 mark.
Planning a December trip to Phu Quoc? Sabrina Rental can sort your motorbike, room or boat trip before you land — send us your dates and we will tell you exactly what December weather means for your itinerary.
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