Best Time To Visit Koh Samui > Weather, Temperature & Season

What is the best time to visit Koh Samui?

The best time to visit Koh Samui is from December to February, which is the dry season. The temperature during this time is around 28 degrees Celcius, making it perfect for enjoying the beaches, watersports, waterfalls, and everything Ko Samui is known for. However, this is also the peak tourist season, so the prices tend to be higher.

Koh Samui has a tropical monsoon climate and remains warm and humid throughout the year. The average temperature throughout the year varies from 26-27 degrees Celsius but can cross 30 degrees during the hot summer months of May and June. October to late December is when the tropical rain lashes down on the island and is regarded as the wettest month of the year. The wet months are not the best time for scuba diving or bathing, but you can take recourse to plenty of activities.

Monthly Weather in Koh Samui

Month	High/Low (°C)	Rain
January	26°/ 23°	4 days
February	26°/ 24°	5 days
March	27°/ 25°	1 days
April	28°/ 25°	11 days
May	29°/ 25°	19 days
June	29°/ 25°	16 days
July	28°/ 25°	13 days
August	28°/ 24°	15 days
September	27°/ 24°	17 days
October	27°/ 24°	18 days
November	27°/ 24°	16 days
December	25°/ 23°	10 days

Koh Samui Travel Packages

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6 Days / 5 Nights

Thailand Tour Package: Experience the Best of B...

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7 Days / 6 Nights

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5 Days / 4 Nights

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8 Days / 7 Nights

8 Day Thailand Itinerary- Krabi, Phuket and Koh...

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Phuket(2N) → Koh Samui(2N) → Bangkok(2N)

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More about Best Time to Travel to Koh Samui

Koh Samui in Peak Season

Koh Samui is mostly dry and satisfyingly warm from late December to early April which is also its peak season. The sea is calm, and the skies are clear though it is not surprising to witness a few occasional showers. The peak season is when throngs of tourist visit the island to enjoy the beaches and all related water and beach activities. It is also the perfect time for mountain biking, trekking through the forests, hiking and swimming. April is when the hot summer begins to set in with temperatures rising under the blaze of the sun.

Koh Samui in Shoulder Season

The months of May, June, July, August and September can be considered as the shoulder season for Koh Samui. May and June are the hottest months of the island, making sightseeing or enjoying the adventures of Koh Samui a tad bit harder under the heat of the scorching sun. The warm months also witness a slight increase in rainfall with a frequent pattern of sunny mornings followed by rains during the afternoons or evening. With an increase in rainfall humidity also increases and it is best to be equipped with mosquito repellants if you plan a visit during the shoulder season. The shoulder season is when most schools are open, making Koh Samui a quieter abode for tranquil travellers. The water activities are inviting in the heat, and so are the cool shades and bars along the beaches.

Koh Samui in Off Season

The months of October to late December are the wettest in Koh Samui and are hence regarded as off season for travellers. Rains are usually heavy or continuous with tropical cyclones common during October - November. Though these are the winter months, temperatures rarely dip below 25 degrees Celsius. The tropical weather is a big advantage for tourists from colder countries who find the warm winters a relief from the otherwise clenching chill. This is the period when accommodation is easy to find, and the tourism industry hits a lull period. However, there is a lot to do in the rainy season as well and the few hours of sunshine can be grabbed to shop for Christmas, laze on the beach or visit the island?s tourist spot.

Koh Samui in January

January is one of the colder months with temperatures falling to 26 degrees Celsius. The pleasant temperatures coupled with marking the end of the rainy season are reason enough to welcome the New Year on the beach island. Humidity is also not much of a concern during this month with an average of only seven rainy days in the month. The waters are warm to enjoy snorkelling, swimming, scuba diving and other water sports. Koh Samui is usually buzzing with tourists during this time of the year though it may get a bit peaceful later in the month. Some of the places to visit include the beautiful Lamai Beach, Chaweng beach, Maenam beach and more. With the advent of the peak season expect accommodation and tariff rates to be high.

Koh Samui in February

February is the driest and one of the most pleasant months to visit Koh Samui. The weather is just perfect for beach lovers, who may want to saunter on the beach or try out the various water adventures. It is also warmer than the preceding winter months with temperatures averaging at 27 degrees Celsius. February can be regarded as the peak month of the peak season to enjoy the white beaches of the island and enjoy a swim or sunbathe. Snorkelling, kayaking, coral reefing are also favourite activities in Ko Taen and other beaches of the island. On Valentine?s Day surprise your partner with a cruise to watch a stunning sunset or relax together with a couple?s massage. Dine a romantic dinner or walk hand in hand along the fantastic beaches to celebrate a memorable day or week of love. February is also usually when the Chinese New Year falls sparking up the island with parties, street lights and fireworks.

Koh Samui in March

March too remains dry, though the temperatures rise just a little. It is still pleasant weather and excellent for hiking, forest trekking, elephant trekking or mountain biking. The weather is inviting for outdoor activities, and the beach is shimmering and warm. The Na Mueang Waterfall hiking trail and the Secret Buddha Garden are some of the outdoor activities that one can try. Water activities continue to be a hit as expected in the peak season. The clear blue skies are welcoming signs to pay a visit to tourist landmarks of the island, such as the Wat Phra Yai where the enormous golden statue of Buddha resides or the Wat Plai Laem. The outdoor markets of the Fisherman?s Village Bophut are great for shopping souvenirs and dining. Makha Bucha Day a Buddhist festival takes place usually in March.

Koh Samui in April

April sets in with the foreboding of rising temperature. The average temperature in April is about 31 degrees, and there is very little rain expected in this month. The increase in heat and humidity makes travellers rush to air conditioned villas and places of stay, yet the waters are warm enough for pleasant swims. The month is not too ideal for outdoor activities such as hiking or trekking, though it is not impossible to give it a try. However, it is the Thai New Year Festival or Songkran which is the main attraction of this month. Despite the heat, tourists love to visit the island during April to be a part of Songkran?s celebrations. This three-day celebration across Thailand is a water festival that is filled with lots of fun and good spirit. The water fights are the highlight of the festivities and usually start in Chaweng a busy town of the island. The island is soaked up in parties, music, water fights and a frenzy that is palpable and infectious.