Koh Samui weather in March (Bangkok Province, Thailand)

This month is known as a warm month. The average maximum daytime temperature in Koh Samui in March lies at 29.1°C (84.38°F). The average minimum temperature goes down to around 25.7°C (78.26°F) (often the minimum temperature is noted at night).

Rainfall during March is moderate with an average of 52mm (2.1 inches). There are generally around 4 rainy days. If you enjoy blue skies and sunshine, then this is a great time to go to Koh Samui with 240 hours of sun during the entire month.


Koh Samui, monthly averages in March

Show in Celsius
Min Temperature 78 °F  
Max Temperature 84 °F  
Water Temperature 83 °F *  
Chance of Rain 15%  
Precipitation 2 in  
Rainy days 5 days  
Humidity 82% *  
Sunshine 240 hrs *  

Where to stay in Koh Samui


Where to go in Thailand in March

Find out more about the weather in Thailand in March and which places have the best weather conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in March? Visitors traveling to Koh Samui might want to wear airy clothing, t-shirts and other summer cloths. Shorts for men made of cotton or linen are good options for staying cool on a hot day. With a water temperature of around 28.5°C (83.3°F), this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in March.

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Koh Samui.

Our site offers climate and forecast data for every country in the world. Are you going to Thailand? On this website you can find historical weather averages for many cities in Thailand. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.