Koh Samui weather in November
Temperature, sea and sunshine in November: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in November
Good
Best time to visit: January – April
What is the weather like in Koh Samui in November?
In November, Koh Samui is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 28.7 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 24 days, totalling 298 mm. The air is often humid and muggy. All in all, November is a good month for a holiday in Koh Samui.
November compared
How the weather changes from October to December. Tap a month to open it.
| OctoberOct | NovemberNov | DecemberDec | |
|---|---|---|---|
| Score | 69 | 69 | 74 |
| Day | 28° | 28° | 28° |
| Night | 26° | 26° | 26° |
| Sea | 29° | 29° | 28° |
| Sun | 6 h | 6 h | 7 h |
| Rain days | 28 | 24 | 17 |
More details for November
- Daylight
- 11 h 42 min06:14 – 17:56
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or more
- Wind
- 15 km/haverage daily peak
- Cloud cover
- 79 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in November
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Koh Samui in November: quick answers
Is Koh Samui hot in November?
Yes. In November, Koh Samui is hot: daytime highs average 28 °C and nights stay around 26 °C.
Can you swim in Koh Samui in November?
Yes. In November the sea averages 28.7 °C – lovely and warm for swimming.
Does it rain much in Koh Samui in November?
It rains often – on about 24 days, adding up to 298 mm.
Koh Samui month by month
The whole year in Koh SamuiAll destinations: ThailandWhere to go in November
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)