We’ve been living in Thailand with our two kids since 2019, mostly in the Gulf of Thailand. But also in Chiang Mai and places like Phuket, Krabi, and Bangkok.
After many Decembers, I’ll be honest: it’s not always sunshine. Especially in the Gulf, like Koh Phangan or Koh Samui, the rainy season is longer than you’d think. We’ve had plenty of soggy Decembers there. If you’re dreaming of sunny beach days, it’s smarter to pick a spot that’s already done with the rain.
Here’s what you need to know about Thailand in December: where to go, what the weather’s like, and how to plan it right.
Is December a Good Time to Visit Thailand?
Yes, but it depends on where you go.
Thailand in December brings cool, dry weather to most regions. Northern Thailand and the Andaman Coast (like Phuket or Krabi) are at their best.
But the Gulf islands (Koh Samui, Koh Phangan, Koh Tao) can still be rainy in this month. You might get lucky, but if you’re chasing beach-perfect days, it’s safer to wait until mid-December or January.
Quick Facts – Thailand in December
Best regions for dry weather: North + Andaman Coast
Still rainy: Gulf of Thailand (especially early December)
Average temps: 25–31 °C (77–88 °F)
Cool mornings: Chiang Mai can drop to 15 °C (59 °F)
Peak season: Yes, so book ahead
Busiest time: Christmas and New Year
Packing tip: Light clothes for the south, a jacket for the north
Best beach picks: Phuket, Krabi, Koh Lanta
Still risky: Koh Samui, Koh Phangan, Koh Tao (before mid-December)
What’s the Weather Like in Thailand in December?
Here’s how the weather looks in each region so you know where to go (and what to avoid).
Northern Thailand
(Chiang Mai, Chiang Rai)
- Daytime: 26–28 °C (79–82 °F)
- Morning/Night: 14–18 °C (57–64 °F)
- Rain: Very rare
This is the cool season up north. You’ll get sunny days, blue skies, and crisp mornings. Great for hiking, sightseeing, and not sweating your way through a temple tour. Bring a light jacket, it gets chilly in the mountains and at night. In our first December in Chiang Mai in 2019, we had a couple of chilling 10°C (50°F) mornings. I couldn’t believe that was possible in Thailand.
Anantara Chiang Mai Resort
- From $291 (€255) per night (Deluxe Room)
- Riverside resort with minimalist design
- Infinity pool overlooking the Mae Ping River
Shangri-La Chiang Mai
- From $124 (€113) per night (Deluxe Room)
- Large outdoor pool with a dedicated children’s area
- Close to Night Bazaar and Old City
Central Thailand
(Bangkok, Ayutthaya, Kanchanaburi)
- Daytime: 30–32 °C (86–90 °F)
- Morning/Night: 21–23 °C (70–73 °F)
- Rain: Almost none
Bangkok in December is actually enjoyable! It’s still warm, but not as humid as the rest of the year. Great for walking around, hopping on boats, or exploring street markets without feeling like you’re melting.
MUU Bangkok
- From $140 (€130) per night (Studio Room)
- Trendy Thonglor location with rooftop pool and boutique vibe
The Okura Prestige Bangkok
- From $175 (€162) per night (Deluxe Room with Club Access)
- Central location with a sky-high infinity pool and direct BTS access
Eastern Thailand
(Koh Chang, Koh Mak, Koh Kut)
- Daytime: 29–31 °C (84–88 °F)
- Morning/Night: 22–24 °C (72–75 °F)
- Rain: Just a few light showers, usually short
This area is less crowded than the south and a good option if you want beach time in December. The weather is usually stable, and the sea is calm enough for boat trips.
Santhiya Koh Chang Resort
- From $200 (€170) per night (Pool Suite)
- Traditional wooden Thai hotel directly on the beach
Andaman Coast
(Phuket, Krabi, Koh Lanta, Khao Lak)
- Daytime: 30–32 °C (86–90 °F)
- Morning/Night: 24–26 °C (75–79 °F)
- Rain: Almost none
This side of Thailand has the best beach weather in December. It’s hot, sunny, and perfect for island hopping. You’ll get great visibility for snorkeling and diving, and calm seas for boat trips. This is where I’d go if I wanted a worry-free beach holiday in December.
Pullman Phuket Arcadia Naithon Beach
- From $331 (€305) per night (Family Room)
- Overlooking Naithon Beach with direct access
- Two outdoor pools, Kids’ club with daily activities
- Read my honest review here!
Sofitel Krabi Phokeethra
- From $200 (€186) per night (Superior Room)
- Massive pool, kids’ club, and a classic resort feel.
Gulf of Thailand
(Koh Samui, Koh Phangan, Koh Tao)
- Daytime: 28–31 °C (82–88 °F)
- Morning/Night: 24–25 °C (75–77 °F)
- Rain: Still very possible, especially early December
This is where we live most of the time, and it’s still rainy in early December. Sometimes it pours for hours. Other times, it’s sunny in the morning and stormy by afternoon. By mid-December, things slowly start to shift, but you still have to be flexible. In 2024, the rain and storms went on until New Year’s Eve. January is much more reliable.
Hyatt Regency Koh Samui
- From $230 (€212) per night (Family Room)
- Read my honest review here!
Koh Tao Cabana
- From $122 (€108) per night (Deluxe Villa)
- At the quiet end of Sairee, with lush gardens and sea-view bungalows.
Festivals and Seasonal Events in December
King’s Birthday – December 5
A national holiday with yellow decorations, candle ceremonies, and public events in honor of the late King Bhumibol. You’ll see photos and lights in many towns.
Christmas – December 24–25
Thailand isn’t a Christian country, but big cities and tourist spots (like Bangkok, Phuket, and Samui) decorate with lights and trees. Most international resorts offer Christmas dinners.
New Year’s Eve – December 31
Big celebration, especially in Bangkok, Chiang Mai, Phuket, and Koh Phangan. Expect fireworks, parties, and big crowds. In Chiang Mai, you’ll also see sky lanterns released at midnight.
Bonus: Loy Krathong / Yi Peng
Some years this falls in late November or early December. If your trip overlaps, don’t miss it! Floating candles and lanterns fill the sky in Chiang Mai and Sukhothai. Magical, even with kids. Celebrating Loy Krathong in Chiang Mai was one of the most memorable experiences we had in Thailand so far.
Travel Tips for December in Thailand
1. Book Early
Flights, ferries, and hotels fill up fast around Christmas and New Year. Prices go up. If you’re traveling mid-late December, don’t wait. Book your Thailand adventure right here!
2. Pack for Different Climates
Bring light clothes for the south and a sweater or hoodie for the north. Chiang Mai mornings can feel cold if you’re used to tropical heat.
Borogo Rain Poncho (2-Pack)
$9.99 – Reusable, lightweight, and a bargain.
Faleave Cotton Linen Palazzo Pants
$29.69, breezy + lightweight, drawstring waist, wide leg—effortless summer chill in every step.
Newshows Summer Maxi Dress
$24.84, flowy + soft, spaghetti straps, side split, floral print—breezy vacay vibes in a comfy boho fit.
Lululemon Align Yoga Pants
$106 – $128, breathable Nulu fabric, super comfy & quick-dry.
COOFANDY Men’s 2-Piece Cotton Linen Set
$35.99 breezy short-sleeve shirt & drawstring pants.
Tyhengta Men’s Swim Trunks
$21.99, quick-dry, 4-way stretch with mesh lining & zipper pockets.
32 Degrees Cool Men’s Active T-Shirt
$11.99 quick-dry, anti-odor, soft stretch tee with raglan sleeves.
3. Watch Out for Holiday Surcharges
Around the holidays, some hotels and restaurants charge extra. Especially Christmas Eve and New Year’s Eve dinners. Check the fine print before you book.
6. Protect Yourself from the Sun
Even in cooler weather, the UV is strong. Bring sunscreen, a hat, and drink tons of water, especially if you’re exploring on foot with kids.
FURTALK Straw Panama Hat
$25.99, timeless + travel-ready, wide brim, and UPF.
KALIYADI Polarized Sunglasses (2-Pack)
$16.98, ultra-light + glare-blocking, retro semi-rimless style.
Sample 10-Day Thailand Itinerary for December
This plan gives you a bit of everything: culture, nature, beach. It works well for couples, or first-timers. Families should have a look at the Thailand itineraries I put together here.
Days 1–3: Bangkok
- Explore temples (Grand Palace, Wat Pho)
- Ride a longtail boat on the Chao Phraya River
- Visit IconSiam or Chatuchak Market
- Optional day trip to Ayutthaya (historic ruins)
Weather: Dry and warm, around 30–32 °C (86–90 °F)
Tip: Stay near the river or in Sukhumvit for easy transport
Days 4–5: Chiang Mai
- Visit temples in the Old City
- Day trip to Doi Inthanon or sticky waterfalls
- Explore night markets and street food stalls
Weather: Cool and dry, 26–28 °C (79–82 °F) during the day, 15–18 °C (59–64 °F) in the morning
Tip: Bring a jacket for mornings and mountain trips
Days 6–7: Khao Sok National Park
- Stay in a floating bungalow
- Kayak, hike, or take a boat on Cheow Lan Lake
- Spot monkeys, birds, and (if you’re lucky) wild elephants
Weather: Dry and cooler than the beach
Tip: Great for a nature break before hitting the coast
Days 8–10: Phuket or Krabi
- Relax on the beach (Ao Nang, Railay, Kata, etc.)
- Take a boat trip to nearby islands (Phi Phi, Hong, James Bond Island)
- Catch the sunset and enjoy seafood (or veggie!) dinners by the sea
Weather: Hot and sunny, 30–32 °C (86–90 °F)
Tip: Book island tours in advance if traveling around the holidays
Want to swap the Andaman Coast for the Gulf Islands? You can go to Koh Samui, Koh Phangan, or Koh Tao instead, but aim for mid-December or later for better weather. Be ready for some rain.
Key Takeaways – Thailand in December
- December is a great time to visit most parts of Thailand, especially the north and the Andaman Coast.
- The Gulf islands (Samui, Phangan, Tao) can still be rainy—wait until mid-December or later if you’re going there.
- Expect peak season crowds and prices around Christmas and New Year—book early.
- Weather is mostly dry and warm, but the north gets cool at night—pack layers.
- Best beach weather is on the Andaman side: Phuket, Krabi, Koh Lanta.
- Perfect month for a mix of culture and beach, with festivals, good food, and beautiful sunsets.
👉 You might also like:
– Celebrating Christmas in Thailand: 2025 Guide
– What to Wear in Thailand? 20 Do’s and Don’ts
– 12 Best Places to Stay in Thailand – Top Family Picks
– How Much is a Trip to Thailand?
– Best Snorkeling Spots in Thailand – Top 10
Final Thoughts on Visiting Thailand in December
Thailand in December can be magical, if you choose the right spots.
If you’re chasing sunshine, stick to the north or the Andaman Coast. If you’re heading to the Gulf islands, come later in the month and keep your plans flexible.
Either way, December is a great time to explore.
Have you visited Thailand in December? How was it? Please let me know in the comments!
Thank you for reading and for making me part of your day! Yours, Lulu
FAQ – Thailand in December
What is the best time to visit Thailand?
The best time to visit most of Thailand is December to March. You’ll get clear skies, minimal rainfall, and cooler temperatures up north. But be careful, the Gulf islands can still be rainy in early December. If you want sunny beach days, go to Phuket, Krabi, or Koh Lanta instead.
Is Thailand hot in December?
Yes, it’s still warm! Average temperatures are between 25–31 °C (77–88 °F). It’s less humid than the rest of the year, so it feels nicer. In the northern regions, like Chiang Mai, mornings can drop to 15 °C (59 °F) or even lower. Bring a light jacket!
Where is the best weather in Thailand in December?
If you’re looking for good weather, go to the Andaman Coast. Phuket, Krabi, Koh Lanta, and Khao Lak have clear skies and sunshine. It’s the perfect spot for water activities, scuba diving, or just relaxing on sandy beaches. The Gulf of Thailand (Samui, Phangan, Tao) still have occasional showers, especially before mid-December.
Can you swim in the sea in December in Thailand?
Absolutely. The sea is warm and lovely in most places. Jellyfish season is over. Andaman Coast beaches offer calm, and clear waters. The Gulf islands can have rougher seas early in the month, but it gets better closer to January.
Is December a good month for outdoor activities in Thailand?
Yes, December is one of the best months for outdoor activities. The air is cooler, especially in the north. Great for hiking, temple tours, and exploring national parks like Doi Inthanon or Khao Sok. You won’t melt while walking around like you do in April!
Does It rain in Thailand in December?
Depends where you are. Most of Thailand has minimal rainfall in December. But the Gulf of Thailand, especially Koh Samui, Koh Phangan, and Koh Tao. can still get heavy rain, especially in the first half of the month. The rest of the country is mostly dry.
What are the best places to visit in Thailand in December?
Some of the best places in December are:
- Khao Sok National Park (amazing for nature lovers and adventure enthusiasts)
- Chiang Mai (cool air, night bazaars, festive atmosphere)
- Bangkok (great for grand palaces, markets, and boat rides)
- Phuket & Krabi (sunny beaches, perfect for water sports)
Is Thailand busy in December?
Yes, it’s peak season. December is a popular time to visit. Especially around Christmas and New Year, prices go up and places get crowded. Book your hotels, ferries, and tours early.
Are there any festivals or events in Thailand in December?
Yes! Here’s what’s happening:
- Loy Krathong / Yi Peng – Sometimes falls in early December. A magical time with floating lanterns, especially in Chiang Mai.
- King’s Birthday (Dec 5) – National holiday, lights, and ceremonies
- Christmas – Tourist spots like Phuket and Bangkok decorate and offer special dinners
- New Year’s Eve – Big fireworks and parties across the country
What should I pack for Thailand in December?
- South: Light clothes, sunscreen, hat, swimwear
- North: Add a sweater or light jacket for mornings
- Shoes for walking, sandals for the beach
- A scarf or cover-up for temple visits
- Reusable water bottle – it’s hot, even in winter!
What if I still want to visit Koh Samui or Koh Phangan in December?
You can! Just come in the second half of the month. Even then, some rain is possible. If you don’t mind a mix of sun and storms, you might get lucky. But for a safer bet, head to the west coast instead.
Just a heads up: some links in “Thailand in December” are affiliate links. If you click and buy, we might earn a small commission at no extra cost to you.
