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Ko Samui in November: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Ko Samui in November will be like? Take a look at our weather guide for Ko Samui, based on historical data.
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November

Weather in Ko Samui in November 2025

OK Weather
Warm
🌧️
Rainy
🌊
Very warm water
If you plan to visit Ko Samui in November, the weather is typically alright, with an average high temperature of +26°C during the day and approximately 1 sunny days. Expect some rainy, though, as there are typically 17 rainy days in the month and around 278 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.
Good to know:
  • November is usually the wettest month of the year in Ko Samui;

Average weather

☀️
+26°C
Avg. max. temperature
+19°C
Min.
+30°C
Max.
278 mm
Total precipitation
82%
Avg. humidity
3 m/s
Avg. wind
1 ☀️
Sunny Days
3 ⛅️
Cloudy
17 🌦
Rainy
Our opinion: Ko Samui has OK weather in November.
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Average temperature in Ko Samui in November

Here are the expected maximum, average and minimum temperatures in Ko Samui for November based on the historical data.
Last Year
Historical Data

Going from a maximum of +28°C during the day to a minimum of +23°C during the night, the temperature in November averages around +26°C.

The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +26°C to +26°C.

Is Ko Samui warm or cold in November?

Ko Samui is typically warm in November.

Maximum temperatures go up compared to the previous month from +26°C to +26°C. The minimum temperature also goes up from +24°C to +24°C.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how November is compared to other months in Ko Samui:

Water temperature in Ko Samui in November

Water in Ko Samui in November is Very warm. It varies from +28°C to +30°C, with an average of +29°C. Note that the air temperature is lower than the water temperature, averaging around +26°C.

In November, water temperatures are average relative to the rest of the year:

The warmest water temperatures in Ko Samui are reached in May, when the average sea temperature rises to +30°C. The coldest water temperatures are in January, with an average of +28°C.

Can you swim in Ko Samui in November?

You can definitely swim in Ko Samui in November, the water is very warm (+29°C in average), and might even be unpleasant for ones who like it more fresh.
🦭
Cold
Below +16°C
🏄‍♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
Don't forget sunscreen and a hat, it's going to be hot!

Climate in Ko Samui in November

Ko Samui weather looks like this, on average, in November and the surrounding months.
OctoberNovemberDecember
Avg. temperature
+26°C+26°C+26°C
Min. temperature
+21°C+19°C+20°C
Max. temperature
+32°C+30°C+30°C
Rainfall
242 mm278 mm115 mm
Wind
2 m/s3 m/s3 m/s
Avg. water temperature
+29°C+29°C+28°C
Humidity
82%82%79%
Air pressure
1009 HPa1010 HPa1011 HPa
Sunny days
012
Cloudy days
2310
Rainy days
161716
Snowy days
000

November weather is still as ok as in October. The temperature levels stay the same in the area of +26°C for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 242 mm to 278 mm. Humidity levels don’t change as the month goes on, averaging around 82%. Winds are stronger in comparison to October, going up from 2 m/s to 3 m/s on average. The good news is there are likely to be more sunny days in November, from 0 to 1.

December brings much the same weather, it remains ok.

Wind

Wind speed in Ko Samui in November based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Ko Samui is gradually increasing during November, going from 2 m/s to 3 m/s over the course of the month.

Rain

Amount of rainfall in mm during November in Ko Samui based on historical data.
Last Year
Historical Data
Typically, there is a 87% chance of rain on an average day in November, with total rainfall of approximately 373 mm. The maximum amount of rainfall per day is around 46 mm, which is moderate rain. November is a pretty wet month with over 26 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
November is one of the rainiest months in Ko Samui, here is a comparison with other months, total mm:
Ko Samui wettest month is November, where a typical day has a 57% chance of precipitation and 278 mm of rainfall per day. February, on the other hand, is the driest month with a mere 39% chance of precipitation and 29 mm of rainfall per day.

How was the weather last November in Ko Samui?

This is the weather in Ko Samui in November 2024:
1 November
🌧️
+26°C
2 November
🌧️
+25°C
3 November
☀️
+27°C
4 November
☁️
+26°C
5 November
🌧️
+26°C
6 November
🌧️
+26°C
7 November
🌧️
+27°C
8 November
🌧️
+27°C
9 November
🌧️
+26°C
10 November
🌧️
+26°C
11 November
🌧️
+25°C
12 November
🌧️
+26°C
13 November
🌧️
+26°C
14 November
🌧️
+26°C
15 November
🌧️
+26°C
16 November
🌧️
+26°C
17 November
🌧️
+25°C
18 November
☁️
+26°C
19 November
☁️
+27°C
20 November
☁️
+27°C
21 November
☁️
+26°C
22 November
☀️
+27°C
23 November
☁️
+26°C
24 November
☁️
+26°C
25 November
🌧️
+28°C
26 November
🌧️
+26°C
27 November
🌧️
+26°C
28 November
🌧️
+26°C
29 November
🌧️
+27°C
30 November
🌧️
+26°C
In November 2024 Ko Samui had 2 sunny days, 7 cloudy days, and 21 rainy days. The average maximum temperature was +26°C, with an absolute maximum of +28°C and a minimum of +25°C. The average humidity was 83%, with a maximum of 93% and a minimum of 71%. The average wind speed was 3 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in November?

Climate Change over Years

This is how Ko Samui climate have been changing during last 43 years period.

The climate in Ko Samui in November has not changed much over the last 43 years.

The average temperature was the lowest in 1986 (+26°C) and the highest in 2012 (+28°C). The driest year was 1997 with only 927 mm of rainfall, and the wettest year was 1999 with 1981 mm.

FAQ

Frequently asked questions about the weather in Ko Samui in November:

Is November a good time to visit Ko Samui?

It’s always a good time to visit Ko Samui, but the weather is changeable in November, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Ko Samui in November?

November is warm in Ko Samui. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Ko Samui in November?

Yes, you can swim in Ko Samui in November, the water is very warm, with temperature averaging at +29°C, but it's important to manage hydration and sun exposure.

Is Ko Samui rainy in November?

Ko Samui is often rainy in November. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Ko Samui in November?

Usually, it’s not very sunny in Ko Samui in November, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in Thailand

Check out the weather for other cities in Thailand.

Monthly weather in Ko Samui

Source of the data

For this page, we’ve looked at the typical weather in Ko Samui, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.