Ko Samui in October usually sees fair weather conditions, with an average daily high temperature of +79°F and roughly 0 sunny days. However, you should prepare for about 16 rainy days with an average precipitation of 242 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+79°F
Avg. max. temperature
+70°F
Min.
+90°F
Max.
242 mm
Total precipitation
82%
Avg. humidity
2 m/s
Avg. wind
0 ☀️
Sunny Days
2 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: Ko Samui has OK weather in October.
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Average temperature in Ko Samui in October
Here are the expected maximum, average and minimum temperatures in Ko Samui for October based on the historical data.
Last Year
Historical Data
The temperature in October is +81°F on average, with a range between a maximum of +82°F during the day and a minimum of +73°F at night.
The average maximum temperature goes down 20% by the end of the month, compared with the beginning of the month, from +81°F to +79°F.
Is Ko Samui warm or cold in October?
Ko Samui is typically warm in October.
Maximum temperatures go down compared to the previous month from +81°F to +79°F. The minimum temperature also goes up from +75°F to +75°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
October is one of the coolest months in Ko Samui, here is the comparison with other months:
Water temperature in Ko Samui in October
Water in Ko Samui in October is Very warm. It varies from +82°F to +87°F, with an average of +85°F.Note that the air temperature is lower than the water temperature, averaging around +79°F.
In October, 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 +86°F. The coldest water temperatures are in January, with an average of +82°F.
Can you swim in Ko Samui in October?
You can definitely swim in Ko Samui in October, the water is very warm (+85°F in average), and might even be unpleasant for ones who like it more fresh.
🦭
Cold
Below +61°F
🏄♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Don't forget sunscreen and a hat, it's going to be hot!
Climate in Ko Samui in October
Ko Samui weather looks like this, on average, in October and the surrounding months.
September
October
November
Avg. temperature
+81°F
+79°F
+79°F
Min. temperature
+70°F
+70°F
+66°F
Max. temperature
+90°F
+90°F
+86°F
Rainfall
142 mm
242 mm
278 mm
Wind
3 m/s
2 m/s
3 m/s
Avg. water temperature
+84°F
+85°F
+85°F
Humidity
79%
82%
82%
Air pressure
1008 HPa
1009 HPa
1010 HPa
Sunny days
0
0
1
Cloudy days
2
2
3
Rainy days
17
16
17
Snowy days
0
0
0
October weather is still as ok as in September.It’s getting colder in October. From +81°F in the day, the average maximum temperature lowers to +79°F.Prepare for more rain. Average rainfall goes from 142 mm to 242 mm.Humidity rises from 79% to 82%.Winds are calmer in comparison to September, going down from 3 m/s to 2 m/s on average.The amount of sunny days stay about the same, averaging 0 sunny days during the month.
November brings much the same weather, it remains ok.
Wind speed in Ko Samui in October based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Ko Samui is gradually increasing during October, going from 3 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during October in Ko Samui based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in October stands at 97%, leading to total precipitation of around 224 mm. The maximum amount of rainfall per day is around 23 mm, which is considered light rain.October is a pretty wet month with over 30 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
October 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 38% chance of precipitation and 29 mm of rainfall per day.
How was the weather last October in Ko Samui?
This is the weather in Ko Samui in October 2023:
1 October
☀️
+81°F
2 October
🌧️
+81°F
3 October
🌧️
+78°F
4 October
☀️
+79°F
5 October
🌧️
+79°F
6 October
🌧️
+80°F
7 October
☁️
+79°F
8 October
☁️
+80°F
9 October
☀️
+81°F
10 October
☀️
+81°F
11 October
🌧️
+80°F
12 October
🌧️
+80°F
13 October
🌧️
+80°F
14 October
🌧️
+81°F
15 October
☁️
+81°F
16 October
☀️
+79°F
17 October
🌧️
+78°F
18 October
🌧️
+80°F
19 October
☀️
+81°F
20 October
☀️
+80°F
21 October
🌧️
+78°F
22 October
🌧️
+79°F
23 October
🌧️
+78°F
24 October
🌧️
+81°F
25 October
☀️
+78°F
26 October
🌧️
+81°F
27 October
🌧️
+80°F
28 October
☁️
+82°F
29 October
🌧️
+80°F
30 October
🌧️
+79°F
31 October
🌧️
+79°F
In October 2023 Ko Samui had 8 sunny days, 4 cloudy days, and 19 rainy days. The average maximum temperature was +81°F, with an absolute maximum of +82°F and a minimum of +79°F. The average humidity was 83%, with a maximum of 100% and a minimum of 72%. The average wind speed was 2 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in October?
Climate Change Over the Years
This is how Ko Samui climate has changed over the last 43 years.
The climate in Ko Samui in October has not changed that much over the last 43 years.
The average temperature was the lowest in 1986 (+79°F) and the highest in 2012 (+83°F). 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 October:
Is October a good time to visit Ko Samui?
It’s always a good time to visit Ko Samui, but the weather is changeable in October, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Ko Samui in October?
October 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 October?
Yes, you can swim in Ko Samui in October, the water is very warm, with temperature averaging at +85°F, but it's important to manage hydration and sun exposure.
Is Ko Samui rainy in October?
Ko Samui is often rainy in October. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Ko Samui in October?
Usually, it’s not very sunny in Ko Samui in October, 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.
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.
