Weather in Ko Samui in November 2025
- November is usually the wettest month of the year in Ko Samui;
Average weather
Average temperature in Ko Samui in November
The temperature in November is +26°C on average, with a range between a maximum of +28°C during the day and a minimum of +23°C at night.
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:
Can you swim in Ko Samui in November?
Climate in Ko Samui in November
| October | November | December | ||||
|---|---|---|---|---|---|---|
| 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 mm | 278 mm | 115 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +29°C | +29°C | +28°C | ||||
| Humidity | ||||||
| 82% | 82% | 79% | ||||
| Air pressure | ||||||
| 1009 HPa | 1010 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 0 | 1 | 2 | ||||
| Cloudy days | ||||||
| 2 | 3 | 10 | ||||
| Rainy days | ||||||
| 16 | 17 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
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
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
How was the weather last November in Ko Samui?
Climate Change over Years
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
Is November a good time to visit Ko Samui?
Can you sunbathe in Ko Samui in November?
Can you swim in Ko Samui in November?
Is Ko Samui rainy in November?
Is it sunny in Ko Samui in November?
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.