Koh Samui in March
Hot and sunny
By Daan · Last reviewed October 2026
The short answer
March is the best month to visit Koh Samui.
March is hot and sunny with calm sea and a bit fewer visitors.
March in detail
What March actually feels like
- Weather
- 25–30°C
- Hot, around 30°C, mostly dry.
- Crowds
- Moderate-High
- Moderate.
- Prices
- $$$$
- Moderate rates.
+Calm sea, fewer crowds.
–Getting hot.
My tip for March
Go to Ang Thong in the morning, before the wind picks up.
- Beaches
- Snorkeling
How March compares
Against the other eleven months
1st of 12 overall in Koh Samui, 2nd for weather, 6th for space, 6th for value. The emptiest month is November; the best value is November.
See all twelve months for Koh SamuiAlso good in March
Weather
Weather in Koh Samui in March
In March Koh Samui averages a high of 30°C (86°F) and a low of 25°C (77°F), with about 116 mm of rain or snow over 5 wet days. The warmest month is May (around 33°C) and the coolest is January (around 29°C); the wettest month is November.
- Average high
- 30°C
- 86°F
- Average low
- 25°C
- 77°F
- Precipitation
- 116 mm
- Wet days
- 5
Climate data: World Meteorological Organization (Ko Samui, 1991–2020). Temperatures are averages of daily highs and lows.
Quick answers
Koh Samui in March: the questions people ask
- Is March a good time to visit Koh Samui?
- March is the best month to visit Koh Samui. It ranks 1 of 12 months in Koh Samui overall (2 for weather, 6 for space, 6 for value). The main upside: Calm sea, fewer crowds. The main downside: Getting hot.
- What is the weather like in Koh Samui in March?
- Average highs are around 30°C and lows around 25°C. Expect about 116 mm of rain or snow over roughly 5 wet days. Hot, around 30°C, mostly dry. For comparison, the warmest month is May (around 33°C) and the coolest is January (around 29°C).
- Is Koh Samui crowded in March?
- Crowds are moderate-high. Moderate. The quietest month is November.
- How expensive is Koh Samui in March?
- Prices are at level 4 of 5 ($$$$). Moderate rates. The best-value month is November.
- When is the best time to visit Koh Samui?
- In the CrowdFreeViews month scores, February is the best month overall (this month). The quietest month is November and the best value is November.