★★★
Budget
Monday Capsule Hostel and Thai Traditional Bath Bangkok
From $3 / night
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Things to Do in Thailand in December
December weather, activities, events & insider tips
High Season · Book Early
December Weather in Thailand
Temperature, rainfall and humidity at a glance
90°F (32°C)
High Temp
73°F (23°C)
Low Temp
0.5 inches (13 mm)
Rainfall
70%
Humidity
Is December Right for You?
Weigh the advantages and considerations before booking
Advantages
- + Peak dry season brings just 10 rainy days. Boat tours to Similan Islands run daily without cancellations. Skies stay postcard blue. Seas flatten to glass.
- + Cool mornings at 73°F (23°C) invite cycling through Ayutthaya's temple ruins before tourist buses arrive. Mist hangs low over brick stupas. You pedal alone.
- + December's low humidity makes Bangkok walkable. Explore Chinatown's Yaowarat Road for hours without the usual sweat-drenched shirt. Breeze carries incense and sizzling pork.
- + Whale shark season peaks at Koh Tao through December, with 30m (98 ft) visibility for divers. Giants glide past like silent buses.
Considerations
- − Prices jump 40-60% from November. That beachfront bungalow in Koh Lanta that was available last month is now booked solid. Budgets feel the sting.
- − Christmas/New Year crowds turn Phuket's Patong Beach into a towel-to-towel situation where finding sand space requires 7 AM arrival. By nine, forget it.
- − Northern Thailand's burning season starts late December. Chiang Mai's air quality begins its annual decline. Haze creeps in. Masks appear.
Best Activities in December
Top things to do during your visit
Similan Islands Liveaboard Diving
December's calm seas and 30m (98 ft) visibility make this the month's crown jewel. The nine-island archipelago opens November 15 through May 15 only, and December hits the sweet spot before Christmas crowds arrive. Water temperature sits at 28°C (82°F). Warm enough for 3mm suits, cool enough that you won't overheat between dives.
Booking Tip: Book 2-3 weeks ahead through Khao Lak operators. Liveaboards run 2-4 days; day trips possible but you'll only see two islands. Look for boats with maximum 12 divers for better site access.
Bangkok Night Bicycle Tours
December's 70% humidity and 73°F (23°C) evenings make after-dark cycling pleasant. Routes through Bang Rak's shophouse districts and across the Memorial Bridge reveal a city that transforms after sunset. Food carts fire up, locals queue for khao tom at 10 PM, and the river breeze cuts through remaining heat. You'll cover 15 km (9.3 miles) without arriving drenched in sweat.
Booking Tip: Most operators run 6-10 PM tours to avoid both traffic and heat. Book 3-5 days ahead. Smaller groups get better market access. Bring a light jacket. River crossings get breezy.
Chiang Mai Monk Chat Temple Visits
Cool December mornings at 16°C (61°F) mean monks linger longer outside before retreating from heat. Wat Chedi Luang's 15:00-17:00 chat sessions attract English-speaking novices eager to practice. Conversations range from Buddhist philosophy to Manchester United. The 600-year-old brick chedi behind you provides shade while December's angle creates perfect photography light.
Booking Tip: No booking needed. Show up at Wat Chedi Luang's main entrance. Bring questions beyond 'what's life like'. Ask about their meditation apps or how they handle social media. December's cooler temps mean sessions run longer.
Railay Beach Rock Climbing
December's dry season transforms Railay's limestone cliffs from slippery death traps to climbable routes. Morning shade on Thaiwand Wall keeps rock cool until 11 AM, while 27°C (81°F) sea breezes prevent the usual forearm sweat-slick. Between climbs, you're 200m (656 ft) from beaches where longtail boats don't run due to calm seas. Meaning actual quiet.
Booking Tip: Book single-pitch intro courses day-of at Railay East. Multi-pitch routes require 2-day advance booking. December's peak season means guides get selective. Arrive early for better instructor matching.
Koh Tao Snorkeling Circuits
December's whale shark peak meets the island's best coral health post-monsoon. Japanese Gardens reef at 8m (26 ft) depth lets you freedive among pink anemonefish without scuba gear. Water clarity reaches 25m (82 ft). From surface you can spot batfish circling below. Morning tours hit three sites before afternoon winds pick up.
Booking Tip: Speedboat tours circle the island in 5 hours versus 8 on slow boats. Book at Mae Haad pier the evening before. December's peak season fills fast but operators hold spots for walk-ups to avoid no-shows.
Where to Stay in Thailand in December
Hand-picked hotels across price tiers for December travellers.
★★★★
Mid-Range
NASA BANGKOK - Airport Rail Link Ramkhamhang
From $16 / night
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★★★★★
Luxury
Divalux Resort and Spa Bangkok, Suvarnabhumi Airport-Free Shuttle
From $40 / night
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December Events & Festivals
What's happening during your visit
December 5
King's Birthday Celebrations
December 5th brings Bangkok to standstill. But in the best way. Ratchadamnoen Avenue closes for candle-lighting ceremonies, locals wear yellow (the King's birth color), and free concerts run until midnight. The real experience happens in Sanam Luang at 19:00 when 100,000 Thais hold candles during the national anthem. Goosebumps guaranteed. Doesn't matter if you're royalist or not, the sound of that many voices hits different.
Early December
Phuket King's Cup Regatta
Asia's biggest yacht race turns Kata Beach into a floating village December 2-9. You don't need sailing knowledge. The beach becomes a festival with live music, food stalls serving massaman curry from massive pots, and yacht crews drinking at 16:00 when races finish. Best viewing: climb to Kata viewpoint for sunset shots of 100+ sails against limestone karsts.
Packing Checklist
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Climate-specific gear, brand recommendations, and what to leave at home.
View Thailand Packing List →Essential Tips
Insider knowledge and common pitfalls to avoid
Insider Knowledge
Book Bangkok-Don Mueang airport transfers after 21:00. December traffic means the 30 km (18.6 mile) ride takes 2+ hours during daylight.
Tuk-tuk drivers in December quote prices in dollars to Christmas crowds. Respond in Thai ('pasa Thai dai') for instant 50% discount.
Island speedboats leave 30 minutes earlier than scheduled in December. Captains depart full boats to beat afternoon winds.
Chiang Mai's Sunday Walking Street expands to Saturday too during December. Same vendors, half the crowds, better negotiating.
Avoid These Mistakes
Assuming December means no rain. Afternoon storms still hit, and boat operators cancel for safety, stranding travelers on islands overnight.
Booking island accommodation without backup power - December's peak demand means generators fail when everyone's running AC
Wearing Christmas-themed clothing in Bangkok - locals find it disrespectful at temples, and you'll stand out as an easy scam target
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Top-rated things to do in Thailand this December
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