Ko Samui Weather in March

Thinking of visiting Ko Samui in March? Expect high temperatures reaching 30°C (86°F) during the day, dropping to 27°C (81°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Ko Samui in March

Past climate data indicates that roughly 4 days will see rain, totalling around 100 mm (3.9 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 Ko Samui in March

Daytime temperatures in Ko Samui reach 30°C (86°F) in March, dropping to 27°C (81°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights remain warm at around 27°C (81°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.

Sunshine in Ko Samui in March

Enjoy a sunny month with about 240 hours of sunshine, the clear skies make Ko Samui even more beautiful.

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.

If you prefer dry days with pleasant temperatures, January and February typically offer the best 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
• June
• July
• August

• September
• October
• November
• December

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

Ko 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 100 mm (3.9 in)  

Rainy days 4 days  

Humidity 82% *  

Sunshine 240 hours *  

Percentage Sunshine *  

* Data from: Koh Samui, Thailand (19 KM, 12 Miles).

What to Wear in Ko Samui in March

Warm but pleasant conditions in Ko 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. The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Ko 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 Ko Samui's climate page.

More climate data for Ko Samui

Temperature Rainfall Sunshine Humidity Water Temp

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