Koh Samui Weather in March

Koh Samui in March sees high temperatures, with highs around 30°C (86°F) and overnight lows of 27°C (81°F). Rainfall is fairly high at around 95 mm (3.7 in) on average, so pack waterproofs just in case.

Rainfall in Koh Samui in March

Looking at the last 30 years, the data shows about 5 days with rain, averaging 95 mm (3.7 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.

Temperature in Koh Samui in March

March in Koh Samui brings typical temperatures with highs around 30°C (86°F) and lows of 27°C (81°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.

Sunshine in Koh Samui in March

The days are predominantly sunny, with an estimated total of around 240 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Average water temperature in March

The water is 29°C (84°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.

Should you favor a climate that's both dry and comfortably warm, January and February typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• September
• October
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• December

For a detailed overview over the year and the best time to visit Thailand, check out our Koh Samui's climate page.

Koh Samui Temperature in March

Min Temperature 27°C (81°F)  

Max Temperature 30°C (86°F)  

Water Temperature 29°C (84°F) *  

Chance of Rain 15%  

Precipitation 95 mm (3.7 in)  

Rainy days 5 days  

Humidity 82% *  

Sunshine 240 hours *  

Percentage Sunshine *  

* Data from: Koh Samui, Thailand (8 KM, 5 Miles).

What to Wear in Koh Samui in March

Warm but pleasant conditions in Koh Samui in March. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Koh Samui in March

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Thailand, check out our Koh Samui's climate page.

More climate data for Koh Samui

Temperature Rainfall Sunshine Humidity Water Temp

See the full Koh Samui climate overview or explore weather in Thailand.