Overview of weather and seasons on Koh Samui by months. We talk about temperature, precipitation and climate features at different times of the year. How is the rainy season? When is the best time to relax on Koh Samui, according to tourists.
When is the holiday season on Koh Samui
Due to the monsoon climate, the Thai island has two seasons - dry and wet. You can have a rest all year round, but most of the holidaymakers come from January to March. The high season on Koh Samui is warm and sunny weather, little rainfall and calm seas.
It is very hot on the island from April to May. In the daytime, the thermometer rises to + 35 ° С. It is difficult to endure extreme heat and humidity, so there are not many vacationers.
When is the rainy season on Koh Samui
Light rains begin in spring. From June to September it is hotter on Koh Samui than in winter, but the weather is pleasant. Short showers occur in the evenings or at night and do not affect the rest in any way.
The main rainy season on Koh Samui starts in mid-autumn and ends in early December. Monsoons do not look as scary as they are described in the press. After the rains, the sun shines again. The main disadvantage of the low season is not rainfall, but strong winds that raise waves.
There are always jellyfish near Koh Samui, but in the rainy season they become more numerous. There are years when poisonous jellyfish appear off the coast of the resort. In this case, the local authorities put up warning boards for tourists on the beaches. During the jellyfish season on Koh Samui, some hotels fence off their bathing areas with protective nets.
Koh Samui Monthly Weather
January
Water and air temperature. In January, the air warms up to + 30 ° С during the day and up to + 20 ° С at night. The sea water is warm + 27 ° С.
Weather. The coldest month on Koh Samui is strikingly different from our usual January weather. There are 7-8 days a month with rains, but these are short-term showers that do not affect the life of the resort in any way.
Reviews of tourists. In the cool season, Thais are often cold. For tourists who came to Thailand from central Russia or Siberia, the tropical winter seems incredibly comfortable. In high season, Koh Samui is good for swimming, sunbathing, diving, water sports and excursions.
February
Water and air temperature. In the middle of winter, the air temperature is + 32 ° С, and sea water + 28 ° С.
Weather. There are 11 sunny days in February, and only 4 rainy days. The amount of precipitation is reduced to 55 mm. It rains for 15-20 minutes, and an hour later everything dries up.
Reviews of tourists. February is the month when it is better to relax on Koh Samui for those who like to lie on the beach. The high season continues. The island does not have the suffocating haze that occurs during the monsoon. Tourists are happy to swim in the sea, sunbathe, ride a jet ski and get acquainted with the sights.
March
Water and air temperature. With the onset of spring, the sun gets hotter, and the temperature rises to + 33 ° C. At night, the thermometer drops to + 24 ° C. The water is warm +28 ... + 29 ° С.
Weather. In March, the number of sunny days increases to 17. The air humidity is higher than in February, so breathing is worse. This is especially noticeable in the last decade of the month.
Reviews of tourists. March ends the high season in Koh Samui. Despite the fact that tours to Thailand are still expensive, many tourists come to the island. Holidays at the popular resort are popular with everyone who is tired of the long cold winter and wants to bask in the hot tropical sun.
April
Water and air temperature. In mid-spring, in the afternoon, the thermometer rises to + 34 ° C. The sea water is warmed up to + 29 ° С.
Weather. In April, the northeast monsoon weakens and a short heat season begins on Koh Samui. The amount of precipitation exceeds 90 mm. There is also enough sun, and it is very active.
Reviews of tourists. The calm, sultry weather is suitable only for those who can easily withstand high temperatures. In April, it is better not to rest on Koh Samui for parents with children, elderly travelers and everyone who suffers from diseases of the heart and blood vessels.
May
Water and air temperature. It is very hot in May. Air temperature +34 ... + 35 ° С, and sea water +29 ... + 30 ° С.
Weather. Daylight hours increase to 12.6 hours. It rains for 10-12 days, the humidity is high. Stuffiness and high temperature are poorly tolerated by small children and people who suffer from diseases of the cardiovascular system.
Reviews of tourists. In the hot season, beach holidays are popular on Koh Samui. Excursions and walking tours have to be postponed until better times. According to tourists, it is better to wait out the heat of the day at the sea, in the pool or under air conditioning.
June
Water and air temperature. In June, the air temperature is +32 ... + 33 ° С, and the sea water temperature is + 30 ° С.
Weather. Daylight hours increase to 12.7 hours. Half of the month is rainy. This does not mean that it rains all day. Summer showers in Thailand are strong but short-lived. They usually take place in the evening or before dawn.
Reviews of tourists. What awaits vacationers who want to go to Koh Samui during the low season? Short rains will not spoil your beach holiday and will not prevent you from going on excursions. Take an umbrella and raincoat just in case.
July
Water and air temperature. In July, the air temperature is + 32 ° С, and the sea water temperature is +29 ... + 30 ° С.
Weather. The number of sunny days is decreasing - only 13. The level of precipitation reaches 105 mm.
Reviews of tourists. In the middle of the calendar summer, the weather on Koh Samui is good. Parents with children, divers, fans of windsurfing and excursion tourism come to the popular resort. There are few vacationers, but the reason for the low season is not the climate. In July, most tourists from Europe rest in the closer Mediterranean and Atlantic resorts.
August
Water and air temperature. In August, the air warms up to + 32 ° С, and sea water - up to + 30 ° С.
Weather. The guidebooks say that at the end of summer, aggressive monsoons dominate the island, and the sky is cloudy. This is only partly true. Rainfall exceeds 90 mm, but the sun shines over Thailand for most of the month.
Reviews of tourists. In summer, tours to Koh Samui are inexpensive, so those who like to save money spend their holidays on the island. Tourists love half-empty beaches and good hotel discounts. In addition to a beach holiday, trips to the Tiger Zoo, the Magic Buddha Garden, the Oceanarium and the crocodile farm are popular.
September
Water and air temperature. With the onset of autumn, the temperature does not change + 32 ° С. Sea water is still warm +29 ... + 30 ° С.
Weather. There are only 11 sunny days in September. The powerful southeast monsoon is gaining momentum, and the rainy season begins on Koh Samui.
Reviews of tourists. Gusts of wind bring freshness, but the sea is stormy. Despite the large amount of precipitation - 125 mm, the rains are short. According to tourists, prolonged showers are possible only at the end of September.
October
Water and air temperature. In the middle of autumn on Koh Samui, the air temperature is + 31 ° С, and the sea water temperature is +28 ... + 29 ° С.
Weather. Daylight hours are reduced to 11.8 hours. Tropical showers last 12-15 days, and the rainfall reaches 175 mm.
Reviews of tourists. There is a lot of sun - 14 days a month, so the beach holiday on Koh Samui does not stop. Only during severe thunderstorms and storms, trips to the beach should be replaced with excursions and shopping.
November
Water and air temperature. At the end of autumn, the island is warm + 31 ° С. The water is warmed up to + 28 ° С.
Weather. November is the rainiest month. The amount of precipitation exceeds 300 mm. This is about a quarter of the norm that falls here for the whole year. It rains every other day, and sometimes water floods rural roads and streets.
Reviews of tourists. The rainy season is in full swing on Koh Samui, so a trip to a popular Thai resort turns into a risky venture. There are conflicting reviews about November weather. Some are unlucky - a beach vacation is spoiled by prolonged rains and storms. Others are happy because there is enough sun on the island in 2 weeks.
December
Water and air temperature. At the beginning of winter, the air temperature is +29 ... + 30 ° С, and sea water + 28 ° С.
Weather. The first 2-3 weeks of December continue to rain. Then the cyclones recede, and the weather improves.
Reviews of tourists. At the beginning of winter, the high season starts on Koh Samui. Most holidaymakers come to the island before Catholic Christmas and New Years. Rent a hotel in Koh Samui in advance!
