December is Vietnam with the volume turned up: the south hits its weather peak, Saigon strings lights across every boulevard, and half the northern hemisphere books a beach escape at once. It’s a genuinely great month — the best of the year for the southern half of the country — but it punishes improvisation harder than any other. Prices step up, rooms sell out, and the difference between a smooth December trip and an expensive scramble is mostly decided weeks in advance. Here’s the honest region-by-region picture, plus the booking rules that matter.
This guide is part of our month-by-month series — start with the best time to visit Vietnam for the full-year map.
Short version: the south is the star — Phu Quoc, Saigon and the Mekong are in full dry-season form all month. The north works as a cool, dry city-break with layers. The central coast is finishing its rainy season and turns the corner late in the month. And everything from December 20 to early January runs on peak-season rules: book early, pay more, or do both.
The One Map That Explains December
| Region | December weather | Verdict |
|---|---|---|
| South (Saigon · Mekong · Phu Quoc) | Peak dry season — sunny, low humidity, calm seas, the year’s most reliable weather | ✅ Go — this is what December is for |
| North lowlands (Hanoi · Ninh Binh · Ha Long) | Dry and cool, 15–22°C; grey spells and evening chill build through the month | 🟡 Good city-break weather with a jacket |
| Central coast (Da Nang · Hoi An · Hue) | Rainy season tapering — late December usually walkable, seas still rough | 🟡 Fine late month for towns, not yet for beaches |
| Far north mountains (Sapa · Ha Giang) | Cold and clear — frost possible at altitude, occasional rime ice on peaks | 🔻 For cold-weather hikers only |
The South: Peak Season, Earned
December in southern Vietnam is the month the brochures are photographed in. Phu Quoc runs wall-to-wall dry-season days — calm west-coast seas, long sunsets, every boat and cable car on full schedule — and the island knows it: this is its busiest, most expensive stretch, especially from Christmas through New Year. The full month-by-month context is in Phu Quoc in December, but the one-line version: the weather is worth it, the pricing is manageable if you book November-style early-month or shoulder your dates away from the holidays.
Saigon in December is one of Southeast Asia’s underrated Christmas cities — the cathedral square and Nguyen Hue walking street go full festive, rooftop season is in swing, and the dry air makes it the best month of the year to actually walk the city (our slow guide covers the routes). The Mekong Delta is in its post-flood prime — cool mornings on the water, fruit orchards heavy, floating markets at their liveliest; Can Tho and the Mekong is the overnight version, and day tours from Saigon sell out around the holidays — comparing Mekong day trips a week ahead beats hotel-desk pricing.
The North: City Breaks in a Jacket
Hanoi in December is dry, atmospheric and cool — daytime 18–22°C early month, sliding toward the mid-teens by New Year, with the city’s famous grey winter light arriving in patches. It’s excellent walking-and-eating weather if you pack for it (locals are in puffer jackets; visitors from actual winters find it mild). Ninh Binh stays very doable, and Ha Long Bay still cruises well — clear stretches alternate with mist, which photographs beautifully even when it steals the horizon. The caveats live in our cruise guide; the city itself is covered in the Hanoi slow guide.
The far-north mountains are December’s specialist pick. Sapa and Ha Giang trade greenery for cold clarity — frost on high passes, occasional rime ice on Fansipan, brown-dry terraces. Trekkers who like crisp air and empty trails get rewarded; everyone else is happier saving the mountains for September or October.
The Central Coast: The Turn Begins
December is the month the central coast finally exhales. The heavy October–November rain core fades, and by the second half of the month Hoi An’s lantern streets and Da Nang’s cafe districts are largely back to walkable, pleasant form — cooler than the postcard season, with grey days mixed in, but no longer flood-watch territory. The sea is the lagging indicator: swimming stays rough and grey into the new year, so a December central-coast stop is a towns-and-food play, not a beach play. If that trade suits you, hotel prices are still at their low ebb; our Hoi An and Da Nang guides cover the indoor-outdoor rhythm that works in this window.
A Sane 10-Day December Route
- Days 1–3: Saigon. Land in the festive city — walking streets, rooftops, museums, and the best food-crawl weather of the year.
- Days 4–5: Mekong Delta. An overnight in Can Tho for the floating market at sunrise, or a well-chosen day tour if time is tight.
- Days 6–10: Phu Quoc. Fly out to the island for the dry-season main event — beach mornings, sunset season, one boat day.
It’s a south-only route on purpose: December rewards depth in the sunny half of the country more than a north–south dash. If you have 14+ days, prepend Hanoi and Ha Long with winter layers. Either way, the route’s fixed points — island rooms and holiday-week flights — are the things to book first; the cities forgive spontaneity, the island in December does not. For trip shapes beyond ten days, the where-to-base guide has the slow-travel version.
Prices, Crowds and the Christmas Rules
December pricing is a tale of two months. December 1–19 is honest high season: rates above November, but rooms available and flights sane. December 20 through the first days of January is a different animal — Phu Quoc beachfront doubles down with holiday supplements, domestic flights fill with the diaspora returning home, and last-minute anything gets expensive. Three rules keep it manageable: book island rooms and holiday flights 4–8 weeks out; travel the first half of the month if your dates are flexible (same weather, meaningfully lower prices — the comparison with November is in our November guide); and if the holidays themselves are the point, lock the room now and enjoy it guilt-free — comparing Phu Quoc dates across December shows exactly where the price cliff sits. One calendar note for planners: Tet, Vietnam’s lunar new year, falls on February 6 in 2027 — December is unaffected, but a January return trip should mind it.
What to Pack for Vietnam in December
- A real jacket if you’re going north — Hanoi evenings in the low teens feel colder than the number in the damp winter air.
- Proper sun kit for the south — December sun on Phu Quoc is full-strength; the breeze disguises how fast you burn.
- One smart-casual outfit — festive-season dinners in Saigon rooftops and island resorts are the one time Vietnam dress codes nudge upward.
- Reservations, not just plans — the December packing list is mostly made of bookings: island rooms, holiday flights, Christmas-week dinners.
- An eSIM installed before you land — peak season runs on live availability checks (our Vietnam eSIM setup).
FAQ
Is December a good time to visit Vietnam?
Yes — it’s the best month of the year for the southern half of the country. Phu Quoc, Saigon and the Mekong are in peak dry-season form, the north offers cool, dry city-break weather, and only the central coast’s beaches lag. The trade-off is peak-season pricing and crowds from December 20 onward, which planning largely neutralizes.
Where is the best weather in Vietnam in December?
The south, without contest. Phu Quoc averages its most reliable sunshine of the year with calm seas on the main west coast; Saigon and the Mekong Delta run sunny, low-humidity days throughout. The north is dry but cool and greying; the central coast is still finishing its rainy season.
Is Vietnam expensive in December?
Only the pinch points are. Food, transport and city hotels stay reasonable all month. The costs that spike are beach accommodation and flights between December 20 and early January — Phu Quoc resorts add holiday supplements and sell out weeks ahead. Traveling December 1–19 captures the same weather at noticeably softer prices.
Is Hanoi cold in December?
Cool rather than cold by most visitors’ standards: 18–22°C days early month, mid-teens by New Year, with damp air that makes evenings feel sharper. Locals bundle up; travelers from real winters find it mild. Pack a warm layer and you’ll enjoy the city’s driest, most atmospheric season.
Should I choose Phu Quoc or Da Nang in December?
Phu Quoc, if beaches are the point — December is its peak month, while Da Nang’s sea is still rough and grey from the tail of the rainy season. Da Nang works as a food-and-city stop late in the month. The full comparison, including the opposite monsoon calendars that explain it, is in Phu Quoc vs Da Nang.
Some links in this guide are affiliate links: if you book through them we may earn a small commission at no extra cost to you. It helps keep our guides honest and free.
Get our free Phu Quoc Trip Kit — the pre-departure checklist, a 5-day plan and our honest booking picks. No spam; at most one email a month.
By subscribing you agree to our privacy policy. Unsubscribe anytime.