Koh Tao in December
Not the best time
The high season begins with perfect weather and festive atmosphere. Christmas and New Year celebrations bring crowds and premium prices.
Weather
December ushers in the cool, dry season with pleasant temperatures around 27°C during the day and refreshing nights at 23°C. The northeast monsoon brings stable weather patterns and calmer seas, though occasional showers still occur.
27°C high23°C low6 rain days
Crowds & Cost
high crowds
~$75/day average
Events & Festivals
- •Christmas celebrations
- •New Year's Eve beach parties
- •King's Birthday (Constitution Day)
December Tips
- •Book accommodation well in advance for New Year's
- •Christmas and New Year bring Western-style celebrations
- •High season prices kick in mid-month
All Months
February through May offers the best diving conditions – calm seas, excellent visibility, and the highest chance of whale shark encounters. The water temperature stays around 28°C, perfect for diving in just a wetsuit. But this is also peak season, so expect crowds and higher prices.
September and October are the sweet spot for budget travelers. The rainy season is ending, accommodation prices drop by 30%, and the diving is still excellent. You might get a few afternoon showers, but they usually pass quickly.
Avoid November through January if possible. The northeast monsoon brings rough seas and limited ferry schedules. Many dive shops close during the worst weeks in December, and you'll be stuck on the island if storms cancel the boats.
Here's the thing about Koh Tao's weather – it can change fast. Even during the dry season, afternoon thunderstorms pop up out of nowhere. Always check the marine forecast before booking diving trips.
Koh Tao Scores
Solo
9/10
Couples
7/10
Families
6/10
Adventure
9/10
Budget
8/10
Luxury
4/10
BUILD YOUR KOH TAO PLAN
Insider picks, smart timing, and a plan ready when you are.