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    Southeast Thailand

    Ko Samui Island weather and climate

    Southeast Thailand

    Ko Samui Island weather and climate

     

    Day

    30 °C

     

    Night

    22 °C

     

    Sea

    28 °C

     

    Precipitation

    191 mm

    in month

     

    Rainy days

    13 days

    in month

     

    Daylight

    11 hours

    average

     

    Sunshine

    6 hours

    average

     

    Humidity

    81 %

     

    Day

    30 °C

     

    Night

    22 °C

     

    Sea

    28 °C

     

    Precipitation

    191 mm

    in month

     

    Rainy days

    13 days

    in month

     

    Daylight

    11 hours

    average

     

    Sunshine

    6 hours

    average

     

    Humidity

    81 %

    Weather charts for Ko Samui Island

    JanFebMarAprMayJunJulAugSepOctNovDecTemperature (° C)1520253035Precipitation (mm)0390
    Weather overview
    JanFebMarAprMayJunJulAugSepOctNovDecTemperature (° C)1520253035Precipitation (mm)0390
    Show more charts
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    Ko Samui Island

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    Season
    Day temperature
    0
    > 16 °C
    36
    Night temperature
    -6
    > 6 °C
    30
    Sea temperature
    16
    > 18 °C
    32
    Wet days per month
    2
    < 15
    20

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    Weather overview for Ko Samui Island

    Weather overview

    Ko Samui Island (Thailand) in general has a tropical climate. The day temperatures range from 29.7 °C (85.5 °F) in December to 34.2 °C (93.6 °F) in April. The highest night temperatures could be experienced in May with 23.9 °C (75.0 °F), the lowest in February with 22.0 °C (71.6 °F). The driest month is February with just 5 days of rain, on the contrary, the month when it rains the most is October with 22 days of rain. The highest sea temperatures in Ko Samui Island are in May with 30.1 °C (86.2 °F) and the lowest in January with 27.6 °C (81.7 °F).

    January weather

    There is pending tourist season in Ko Samui Island, while the dry season is at its beginning. The sea temperature reaches its minimum, with its value being 27.6 °C (81.7 °F), while the beginning of the rise of the day temperature could be noticed, with its value being 31.1 °C (88.0 °F). The number of rainy days descents similarly to the previous month, the value of this measure is 9 days. The number of sun hours (without clouds) continues to rise, its value is 7 hours.

    February weather

    The tourist season is close to its peak in Ko Samui Island. The sea temperature starts to rise, while the day temperature rises similarly to the previous month, its value is 32.2 °C (90.0 °F). The minimum of the number of rainy days can be noticed, the value of this measure is 5 days, and the minimum of the rainfall amount is observable too, with its value of 45 mm (1.77 in). The night temperature is on its minimum in February. The maximum of the number of sun hours (without clouds) is observable, with its value of 8 hours.

    March weather

    There is pending tourist season in Ko Samui Island, and the dry season continues as well. The rise of the day temperature can be observed, its value is 33.6 °C (92.5 °F), and the sea temperature continues to rise as well. The number of rainy days starts to rise, the value of this measure is 6 days, and the rainfall amount starts to rise as well, with its value of 94 mm (3.69 in).

    April weather

    The tourist season continues in Ko Samui Island. The maximum of the day temperature can be noticed, its value is 34.2 °C (93.6 °F), while the rise of the sea temperature can be observed, with its value being 30.0 °C (86.0 °F). The number of rainy days rises similarly to the previous month, the value of this measure is 10 days, while the beginning of the descent of the rainfall amount could be noticed, its value is 82 mm (3.23 in). The number of sun hours (without clouds) descent's start could be observed, with its value being 8 hours.

    May weather

    The day temperature starts to descent, with its value being 33.6 °C (92.5 °F) in Ko Samui Island, while the sea temperature is on its maximum in May. The rise of the number of rainy days can be observed, with its value being 19 days, while the rainfall amount starts to rise in May. The night temperature reaches its maximum, with its value being 23.9 °C (75.0 °F). The number of sun hours (without clouds) continues to descent, with its value being 6 hours.

    June weather

    The day temperature descents similarly to the previous month, its value is 32.6 °C (90.7 °F) in Ko Samui Island. The rainfall amount starts to descent, with its value of 107 mm (4.20 in). The number of sun hours (without clouds) continues to descent, with its value being 6 hours. The minimum of the humidity is observable in this month. The day length reaches its maximum in June.

    July weather

    The wet season is at its beginning this month in Ko Samui Island. The number of rainy days starts to rise, with its value being 20 days. The rise of the wind speed can be observed, its value is 2.5.

    August weather

    The wet season is taking place this month in Ko Samui Island. The beginning of the rise of the rainfall amount could be noticed, with its value being 116 mm (4.58 in). The wind speed reaches its maximum, its value is 2.7.

    September weather

    The number of rainy days starts to rise, with its value being 21 days in Ko Samui Island, while the rainfall amount rises similarly to the previous month, its value is 145 mm (5.72 in). There is pending wet season in September. The minimum of the number of sun hours (without clouds) is observable, the value of this measure is 6 hours. The beginning of the descent of the night temperature could be noticed in this month.

    October weather

    The ongoing wet season is noticeable in Ko Samui Island. The maximum of the number of rainy days can be noticed, with its value of 22 days, while the rainfall amount rises similarly to the previous month, the value of this measure is 264 mm (10.41 in). The beginning of the descent of the day temperature could be noticed, its value is 30.9 °C (87.6 °F). The wind speed is on its minimum.

    November weather

    The wet season is close to its peak in Ko Samui Island. The day temperature descents similarly to the previous month, with its value being 30.1 °C (86.2 °F), while the sea temperature descent's start could be observed in this month. The rainfall amount reaches its maximum, its value is 371 mm (14.60 in), while the beginning of the descent of the number of rainy days could be noticed in November. The humidity is on its maximum, the value of this measure is 84 %.

    December weather

    The tourist season slowly starts in Ko Samui Island. The minimum of the day temperature can be noticed, with its value of 29.7 °C (85.5 °F), while the descent of the sea temperature can be observed, the value of this measure is 27.7 °C (81.8 °F). The number of rainy days descents similarly to the previous month, with its value being 13 days, while the rainfall amount descent's start could be observed, the value of this measure is 191 mm (7.53 in). The beginning of the rise of the number of sun hours (without clouds) could be noticed in this month.

    FAQs

    What is the temperature in Ko Samui Island during the day in January?

    The average daily temperature in Ko Samui Island in January is 31.1 °C (88.0 °F). The great temperature for lying by the sea or pool and sunbathing, everywhere else you will probably be a bit hot. Don't forget to drink during the day, in these temperatures you should hydrate yourself a lot.

    Is it hot in February in Ko Samui Island?

    Yes, it is hot in Ko Samui Island in February, although the perception of heat can be subjective. Daytime temperatures rise to 32.2 °C (90.0 °F).

    What is the sea temperature in March in Ko Samui Island?

    In March in Ko Samui Island expect the sea to be warm at 29.0 °C (84.1 °F). This temperature is someone's dream come true, while for someone it may no longer be ideal for the purpose of refreshment.

    Are there good conditions to visit in April in Ko Samui Island?

    In April in Ko Samui Island, there are ideal conditions for a vacation. The temperature of the sea will be perfect at 30.0 °C (86.0 °F). At night, temperatures hover around a pleasant 23.5 °C (74.3 °F). You can expect just 10 days of rain during the month, taking an umbrella is not necessary. Some people will find 34.2 °C (93.6 °F) temperature high, while others will enjoy it.

    Is there a wet season in Ko Samui Island in May?

    No, there is no wet season in Ko Samui Island in May - you can expect 19 days of rain during the month.

    What is the air temperature in June in Ko Samui Island at night?

    The average night temperature in June in Ko Samui Island is 23.5 °C (74.3 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.

    What level of humidity is to expect in Ko Samui Island in July?

    Humidity in July in Ko Samui Island is 77 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.

    How many sunny hours can I expect in August in Ko Samui Island?

    In August in Ko Samui Island, you can expect around 6 hours of sunshine.

    How windy is Ko Samui Island in October?

    An average wind scale that can be expected in Ko Samui Island in October is 1.4. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.

    Is there a dry season in Ko Samui Island in November?

    No, November is not a dry month in Ko Samui Island, expect rain approximately 20 days in a month.

    How many days of precipitation on average can I expect in December in Ko Samui Island?

    There are 13 days, which are rainy in December in Ko Samui Island, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 3.0 days of the week, or in general - 43 % days.

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