The second-largest island in Thailand, Koh Samui was originally settled by Chinese fishermen about 1,500 years ago. It remained largely isolated until the first paved road was built in the 1970s and the airport opened in 1989. The island is home to the famous 12-meter-tall golden Big Buddha statue at Wat Phra Yai, built in 1972.
Nights sit around 25°C and afternoons around 32°C, though some days reach 35°C.
Koh Samui barely changes season: afternoons sit around 31°C and nights around 25°C most of the year.
There is a clear wet season from May – December, peaking in November with around 362 mm. The driest month is February, with about 40 mm.
Air quality is worth watching: January averages an AQI of 63, while September clears to 28.
Daylight is steady all year, around 12.0 hours a day.
For what you're after, the best months in Koh Samui are January – April. Expect fast internet (257 Mbps) and a moderate cost of living (about €900 a month).
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