Koh Samui · Month comparison
January vs April
April ranks #1 overall vs January at #5. Songkran brings Thai New Year festivities — warm, slightly wetter, but culturally unmissable.
January
#5 of 12 months
Strong option
Peak dry season: reliably sunny, warm, and the most visited month on the island.
- ↑Consistent sunshine with only 58mm of rain spread across the month — outdoor days rarely disrupted
- ↑Sea conditions ideal for snorkelling at Ang Thong Marine Park and Koh Tao day trips
April
#1 of 12 months
Best match
Songkran brings Thai New Year festivities — warm, slightly wetter, but culturally unmissable.
- ↑Songkran water festival (13–15 April) transforms Na Thon and Chaweng into celebrations of Thai New Year
- ↑Good value accommodation: 30–35% below peak-season rates with weather still mostly excellent
| Factor | January | April |
|---|---|---|
| Weather score | 8 | 7 |
| Value score | 4 | 6 |
| Crowd score | 3 | 6 |
| Events score | 5 | 7 |
| Atmosphere | 7 | 8 |
| Avg high temp | 29.8°C | 32.8°C |
| Monthly rain | 58mm | 83mm |
| Daily sunshine | 7.8hrs | 7.5hrs |
January trade-offs
- ↓Peak prices: resort rates 40–60% above low-season levels, with beachfront villas selling out months ahead
- ↓Chaweng Beach strip at maximum tourist density — sunbed space genuinely competitive
- ↓Flight connections from Bangkok and Singapore fill quickly; book transport well in advance
April trade-offs
- ↓Songkran week: hotel prices spike temporarily and transport books up fast
- ↓83mm of rain is manageable but occasional heavy afternoon showers begin appearing
- ↓Peak heat of 32.8°C: demanding for any strenuous outdoor activity between 11am and 3pm
Scores compare months within Koh Samui. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →