Thailand in December offers some of the best travel conditions of the year, with less rain, more comfortable temperatures and generally favourable weather across much of the country.
There is one important exception: the southern Gulf of Thailand can still be wet. Here is what to expect from Thailand’s weather in December, where to go for the best conditions and how to plan your trip around the Christmas and New Year holiday season.
December Travel: Key Things to Know
- Bangkok, Northern Thailand and the central region are generally dry and pleasant.
- Chiang Mai and Chiang Rai can have cool mornings and nights, particularly in the mountains.
- Phuket, Krabi, Khao Lak and the Andaman coast enter their peak travel season.
- Koh Chang and the islands of Eastern Thailand usually enjoy favourable conditions.
- Koh Samui, Koh Phangan and Koh Tao can still experience periods of significant rain.
- Visitor numbers and prices rise sharply around Christmas and New Year’s Eve.
Is December a good time to visit Thailand?
Yes. December is generally one of the most favourable months for travelling around Thailand. The cool season is usually well established in the North, Northeast and central region. Rain becomes less frequent, and humidity often feels less oppressive than during the monsoon months.
The Tourism Authority of Thailand describes December as a major month of the cool season, particularly attractive for Northern Thailand, outdoor activities and coastal holidays.
On the Andaman coast, Phuket, Phang Nga, Khao Lak, Krabi, Trang and Satun become especially popular. Conditions are generally more suitable for boat excursions, and prolonged spells of bad weather are less common.
The main exception is the southern Gulf of Thailand. Koh Samui, Koh Phangan and Koh Tao have a different rainfall pattern, and the northeast monsoon can still bring heavy showers in December.
For a clearer explanation of these regional differences, read our guide to Thailand’s rainy season. The best time to visit depends on which coast and islands you have in mind, not just the month on your calendar.
What is the weather like in Thailand in December?
Thailand stretches for more than 1,600 kilometres from north to south. A single national weather average is therefore not especially useful when planning a trip: Bangkok, Chiang Mai, Phuket and Koh Samui can experience very different conditions in the same week.
The temperature ranges below are approximate seasonal reference points, not forecasts for specific travel dates. Local conditions and daytime highs can vary.
| Region | Typical temperatures | Rainfall | Overall conditions |
|---|---|---|---|
| Bangkok and Central Thailand | Around 24–32°C (75–90°F) | Low | Very favourable |
| Chiang Mai and Northern Thailand | Around 15–30°C (59–86°F) | Low | Very favourable; cooler nights |
| Pattaya and Koh Chang | Around 23–31°C (73–88°F) | Low to moderate | Favourable |
| Phuket, Krabi and the Andaman coast | Around 24–31°C (75–88°F) | Declining significantly | High season |
| Koh Samui, Koh Phangan and Koh Tao | Around 25–30°C (77–86°F) | Still relatively frequent | More changeable |
To check the forecast shortly before departure or ahead of a boat trip, use the Thai Meteorological Department. Our weather in Thailand guide also provides a wider overview of the country’s climate.
Bangkok and Central Thailand in December
December is one of the most pleasant months for exploring Bangkok. The rainy season is normally over, showers become much less common and mornings are generally more comfortable than during the hottest part of the year.
Afternoons are still tropical and can exceed 30°C (86°F), but the humidity usually feels less intense. This makes December a good time for temples, Chinatown, markets, historic neighbourhoods and walks along the Chao Phraya River.
For sightseeing ideas and practical tips, see our Bangkok travel guide.
Ayutthaya, Kanchanaburi and Khao Yai National Park are also good extensions to a Bangkok stay. With rainfall usually limited, overland journeys and outdoor visits tend to be easier to organise than in September or October.
Chiang Mai and Northern Thailand in December
December is one of the best months to visit Northern Thailand. Chiang Mai, Chiang Rai, Pai and the mountain regions usually enjoy dry, sunny days, with noticeably cooler temperatures after dark.
In Chiang Mai, daytime temperatures remain mild to warm, but the temperature can drop early in the morning. The contrast is even more pronounced in the mountains.
At Doi Inthanon, Thailand’s highest mountain, a jumper, lightweight jacket or several layers can be useful before sunrise. If your itinerary includes the mountains, do not pack as though you were heading only to Phuket.
Temples, markets, cafés, hiking and day trips are particularly enjoyable at this time of year. Our Chiang Mai travel guide covers the main attractions, while Chiang Rai makes an interesting extension for temples and northern landscapes.
Phuket, Krabi and the Andaman coast in December
The Andaman coast is one of the most reliable choices for a beach holiday in December. The region is entering its busiest travel season, with generally more favourable conditions for beaches and boat excursions.
Popular destinations include Phuket, Krabi, Khao Lak, Koh Lanta, Koh Phi Phi and Koh Lipe. Tropical showers remain possible, but they are usually less persistent than during the southwest monsoon.
For the widest choice of accommodation, restaurants and activities, Phuket is a convenient all-round option. If you prefer dramatic limestone cliffs, beaches and island excursions, use our Krabi travel guide to plan time around Ao Nang and Railay.
For a quieter atmosphere, consider Khao Lak or Koh Lanta.
Before booking a boat trip
Favourable climate averages do not guarantee calm seas every day. Check local marine forecasts, follow operator instructions and respect beach safety flags.
Koh Samui, Koh Phangan and Koh Tao in December
One of the biggest mistakes when planning a December holiday in Thailand is assuming that the dry season begins at the same time on every coast.
Koh Samui, Koh Phangan and Koh Tao lie off the eastern coast of Southern Thailand, an area exposed to the northeast monsoon. This part of the South generally receives more rain during Thailand’s cooler months than the Andaman coast.
The Thai Meteorological Department’s 1991–2020 climate normals illustrate the difference: Koh Samui receives an average of approximately 263 mm of rain in December, compared with around 82 mm in Phuket.
December often marks an improvement over November, but heavy rain, rough seas and ferry disruptions remain possible.
A trip can still work if you are comfortable with changeable weather. For a short holiday focused on beaches, snorkelling and boat trips, however, Phuket, Krabi or Khao Lak are usually the safer choices from a seasonal weather perspective.
If the islands of the southern Gulf are a priority, keep your itinerary flexible and check marine conditions close to departure.
Is Koh Chang a good choice in December?
Yes. An important distinction is that Koh Chang and Koh Samui do not share the same rainfall pattern, even though both are located on the Gulf of Thailand side of the country.
Koh Chang, Koh Kood and Koh Mak lie much farther east, near Trat province. Their wettest period is usually over by December, making them attractive options for island time.
They are also practical choices if you want to combine Bangkok with a beach holiday without travelling all the way to Phuket or Krabi.
For a closer look at the island, see our Koh Chang guide and first-hand experience.
Early, mid or late December: when should you go?
Weather is generally favourable in much of Thailand from the beginning of December. Your dates are more likely to affect crowds, accommodation prices and the situation around the southern Gulf.
| Dates | Weather | Crowds | Main consideration |
|---|---|---|---|
| 1–10 December | Very favourable in the North, central region and on the Andaman coast; more variable around Samui | Busy, but generally less crowded than the festive period | Good balance between weather and visitor numbers |
| 11–20 December | Generally settled across many regions | Increasing | Book popular beach destinations ahead |
| 21–31 December | Often favourable, but never guaranteed | Very high | Peak demand around Christmas and New Year |
For many travellers, the first half of December offers the best compromise: the drier season has already arrived in many areas, while demand for hotels and transport is usually lower than between Christmas and New Year.
Where to go in Thailand in December for your travel style
| Travel priority | Best destinations to consider | Why |
|---|---|---|
| First trip to Thailand | Bangkok + Chiang Mai + Phuket or Krabi | A balanced mix of cities, culture and beaches with generally favourable weather |
| Beach holiday | Phuket, Krabi, Khao Lak, Koh Lanta, Koh Lipe | High season on the Andaman coast |
| Mountains and nature | Chiang Mai, Chiang Rai, Pai | Cooler season and usually limited rainfall |
| Bangkok + an island | Bangkok + Koh Chang or Koh Samet | Fewer long-distance transfers and generally favourable seasonal conditions |
| Southern Gulf islands | Koh Samui, Koh Phangan, Koh Tao | Possible with flexible plans, but rain and sea conditions are less predictable |
If you are undecided, start by choosing between a cultural itinerary in the North and a beach-focused trip, then select the coast with the most suitable seasonal conditions.
Is Thailand more expensive in December?
Generally, yes. December falls within Thailand’s main tourist season, with higher demand particularly noticeable in Phuket, Krabi, Khao Lak, Chiang Mai and popular island destinations.
Rates and demand tend to rise most sharply around Christmas and New Year’s Eve. If your budget is limited, the first half of December is usually a better option. Our Thailand travel budget guide can help you estimate accommodation, food, transport and activity costs.
Thailand public holidays and events in December 2026
Several dates in December 2026 may affect opening hours at government offices, banks and some services, as well as travel demand.
5 December marks the birthday of King Bhumibol Adulyadej, National Day and Father’s Day. In 2026, 5 December falls on a Saturday, so Monday 7 December is the substitute public holiday.
10 December is Constitution Day, while 31 December is New Year’s Eve. The dates are listed in the Bank of Thailand’s official financial institutions holiday calendar.
Christmas and New Year’s Eve in Thailand
Christmas is not a national public holiday in Thailand, but shopping centres, hotels, restaurants and popular tourist districts put on decorations and seasonal events.
As New Year’s Eve approaches, crowds and travel demand increase significantly. Bangkok, Chiang Mai, Pattaya, Phuket and major islands commonly host celebrations and countdown events around 31 December. Specific programmes should be checked locally closer to the date.
If you are travelling between 28 December and the first days of January, arrange important transport connections and accommodation well in advance.
Is air pollution a concern in December?
December often brings good visibility after the rainy season, but air quality can still vary from day to day in major cities and Northern Thailand.
Before a hike, mountain excursion or long day outdoors, check current readings from the official Air4Thai monitoring network. The main northern burning season is typically later, but that does not mean pollution is impossible in December.
What to pack for a December trip
For Bangkok and Southern Thailand, pack mainly light, breathable clothes. Sunscreen, a hat and suitable footwear remain useful even during the cooler season.
If your itinerary includes Chiang Mai, Chiang Rai, Pai or high-altitude excursions, bring a jumper or lightweight jacket. Mountain mornings can feel unexpectedly chilly.
For Koh Samui, Koh Phangan or Koh Tao, consider a compact rain jacket and a dry bag. Remember to pack clothing that covers your shoulders and knees for temple visits.
For a more complete preparation list, use our Thailand travel checklist.
What is the best Thailand itinerary for December?
On a first trip of around 10–14 days, December makes it relatively easy to combine Bangkok, Northern Thailand and a beach destination.
- Bangkok: 3 days for temples, markets and neighbourhoods.
- Chiang Mai and the North: 3–4 days for culture and a mountain excursion.
- Phuket, Krabi or Khao Lak: 4–6 days for beaches and relaxation.
Avoid adding too many islands or long transfers to a short itinerary, and consider a buffer before your international flight if you will be travelling by ferry.
You can also use our free Thailand itinerary planner. Select December, your trip length and your interests to generate a route that takes seasonal conditions into account.
November or December: which month is better?
Both months can be very good, but they suit slightly different priorities.
November generally offers greener landscapes, somewhat fewer visitors and cultural highlights such as Loy Krathong. The transition into the drier season may still be incomplete on some coasts.
December usually brings more settled weather in the North, central region and on the Andaman coast. The trade-off is greater demand, particularly in the second half of the month, when prices and crowds rise.
For a detailed comparison, read our guide to Thailand in November.
Frequently asked questions about visiting in December
Is December a good month to visit Thailand?
Yes. December is usually among the best months for Bangkok, Northern and Central Thailand, the eastern islands and the Andaman coast. The southern Gulf can still be significantly wetter.
Does it rain a lot in Thailand in December?
Rainfall is generally low in the North, central region and much of the East. Koh Samui, Koh Phangan and Koh Tao are different: the northeast monsoon can still bring rainy periods.
Is Phuket good in December?
Yes. December falls during the high season on the Andaman coast, and conditions are generally suitable for beaches and island excursions. Occasional showers and temporary rough seas are still possible.
Is Koh Samui worth visiting in December?
It can be, but December is less reliable for beach weather than on the Andaman coast. Rainfall may remain substantial, particularly when the northeast monsoon is active.
Koh Chang or Koh Samui in December?
If your priority is a higher chance of dry weather, Koh Chang is generally the better option in December. Koh Samui has a different climate pattern and often receives considerably more rain.
Is Chiang Mai cold in December?
Days remain pleasant and can be warm, but mornings and nights can feel cool. Temperatures are much lower at higher elevations, particularly around Doi Inthanon.
Is Thailand crowded in December?
Yes. December is high season, with the biggest rush around Christmas and New Year’s Eve. Bangkok, Chiang Mai and popular beach destinations can be especially busy.
Which part of Thailand is best for beaches in December?
The Andaman coast is generally the most reliable choice: Phuket, Krabi, Khao Lak, Koh Lanta and Koh Lipe have favourable seasonal prospects. Koh Chang is another appealing option in Eastern Thailand.
December or January: when is better for Thailand?
Both months generally offer very good conditions across much of the country. January tends to be more favourable around Koh Samui, while December is particularly attractive for festive celebrations and the beginning of peak travel season.
Final thoughts: is December a good time to go?
December generally brings excellent travel conditions to Northern, Central and Eastern Thailand and the Andaman coast. Bangkok, Chiang Mai, Phuket, Krabi and Koh Chang are among the most attractive choices at this time of year.
Koh Samui, Koh Phangan and Koh Tao remain more exposed to rain, while accommodation prices and crowds increase sharply over Christmas and New Year. Choose your region carefully, book ahead for the festive period and check local forecasts before sea-based excursions.
