Best Time to Visit Koh Samui | Weather Info and What to Expect

Ever wondered the best time to visit Koh Samui, Thailand? Checkout our latest blog to find out what to expect in each season!

Koh Samui is one of Thailand's most popular tropical paradises, for good reason. It boasts stretches of white sand and lush jungles. For most of the year, it's balmy and sun-soaked, but Koh Samui does have a fierce monsoon season! The weather in Koh Samui can be tricky to navigate. We take you through month by month so you can discover the best time to visit Koh Samui. Our Koh Samui Guide outlines to what to expect in each season.

Dry Season: January- February

Dry Season: January- February

Koh Samui's Dry Season starts in January and runs through February for three months of temperate, dry beach-ready weather.

What to expect in: January

Tourists flock to Koh Samui in January to soak up some island rays at your beach club while avoiding the sweltering heat. Temperatures hover in the 70s and low 80s, making January pleasant weather for those not accustomed to tropical heat.

What to expect in: February

February is the driest month of the year, with incredible weather! Take your sweetheart to a luxurious beach club during February and you won't be disappointed.

What to expect in: March

You'll enjoy the dry weather and warm seaside winds during March, but those who visit towards the end of the month will find that the mercury is rising fast.

Hot Season: April- September

Hot Season: April- September

Koh Samui's Hot Season is the longest and most varied of the seasons. Some months are scorchers, while others are absolutely sublime. Read on for details! Hot Season starts in April and runs through September.

What to expect in: April

April is the hottest month of the year, with temperatures reaching up to 100 degrees Celsius. Fortunately, it's also when Songkran (Thai New Year) occurs. Songkran is famous for it's huge water fights so you can beat the heat by joining the fun!

What to expect in: May

May's temperatures are sizzling but you'll find some relief in an uptick of rainfall, as Hot Season begins its slow descent into monsoon/rainy season. May storms are a brief and welcome respite from the heat.

What to expect in: June

June is the height of Hot Season. It's cooler than April and May, but ferocious thunderstorms are not yet a daily occurrence. Enjoy splendid days relaxing on Koh Samui's gorgeous beaches.

What to expect in: July

Along with January; July and August are when vacationers flock to Koh Samui. The weather is beautiful, the rain is sparing and it's the perfect time to enjoy this fabulous island.

What to expect in: August

Visitors can expect magnificent weather in August, arguably the best time to visit Koh Samui. Divers and snorkelers will especially love visiting during August.

What to expect in: September

Early September mimics August, but as the month rolls on you'll notice a change in the temperature and precipitation. September rests on the edge of the rainy season.

Rainy Season: October- December

Rainy Season: October- December

Koh Samui’s rainy season can be intense but it’s still possible to have a string of nice days. You can find something fun to do like chilling in the ocean club, enjoying an indoor brunch or watching a good movie.

What to expect in: October

October can be a hit-and-miss month. Some days are clear and sunny, while others are cloudy and rainy. The last week of October issues in the official rainy season.

What to expect in: November

November is the heart of the rainy season, with Koh Samui getting well over a foot of rain. Even if paradise is drenched, there are still several indoor activities to do if you visit during November.

What to expect in: December

December is windy and rainy at the beginning of the month, then slowly becomes warmer with calmer seas as the New Year approaches.

The "Gem of the Gulf" is amazing any time of the year, but having a good understanding of the weather in Koh Samui will make your trip memorable and help you make the most of your vacation!