Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Koh Samui decisively leads Phuket in December across both environmental comfort and space tranquility. With a composite index advantage of +32 points, Koh Samui delivers superior sightseeing conditions (32°C feels-like, 38% rain probability) while avoiding the heavier tourist footfall and queue friction observed in Phuket.