Very hot in Nov
34°C average high
avg high · 23° at night
25°C+ on almost every day
Thailand
Koh Samui weather in November
Is it warm? Yes. November in Koh Samui is hot: afternoons average 30°C and nights 24°C. Most days (80%) peak between 29°C and 31°C.
Hot · average high
30°C
25°C or more on almost every day.
- Average low24°overnight
- Sea29°average, 2022–2025
- Rainy days19371 mm in the month
- SkyMostly cloudy80% cloud · 4% clear days
How warm it really gets
Every November afternoon from 2011–2025: 450 days. Most (80%) peaked between 29° and 31°.
November, year by year
The average November high in each year. The warmest, 2019, averaged 30°C; the coolest, 2021, 29°C.
Compared with home
Average November highs. Expect rain on about 19 days (371 mm in a typical month).
- Koh Samui30°
- London12°
- Cork12°
- Dublin11°
- Belfast11°
- Manchester10°
- Glasgow10°
Warmer in November, not much further
Flying times are estimates from Dublin; Koh Samui is about 13h.
Hot in Nov
32°C average high
avg high · 20° at night
25°C+ on almost every day
Hot in Nov
31°C average high
avg high · 22° at night
25°C+ on almost every day
Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Koh Samui. Sea: Copernicus ERA5, 2022–2025. Rainy days = days with 1 mm of rain or more, as weather stations count them. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology