Ko Samui weather in November
In November, Ko Samui sees average daytime highs of 28°C and overnight lows near 26°C, with 289 mm of rain across 20.9 wet days and about 11.6 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 19% of the time in November, and the air most often feels oppressive.
Daylight stretches from about 11 h 42 min at the start of November to 11 h 30 min by month's end. Set against the rest of the year, November is Ko Samui's 6th-clearest and 8th-windiest month. For the whole year in context, see Ko Samui's year-round climate.
- Daytime high
- 28°
- 9th warmest
- Overnight low
- 26°
- 4th coldest
- Rainfall
- 289 mm
- 20.9 wet days
- Daylight
- 11 h 36 min
- 6:19 AM – 5:52 PM
- Cloud cover
- 71%
- 6th clearest
- Wind
- 17 km/h
- 8th windiest
- Solar energy
- 4.49 kWh/m²
- Travel score
- 4.6
- out of 10
Ko Samui is city in Surat Thani province, Thailand.
- Density
- 219/km²
- people per km²
- Founded
- 1956
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in November
Day-to-day highs hold fairly steady near 28°C through the month.
A typical November day in Ko Samui reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, November runs on par with October and on par with December.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 26 |
| 2 | 28 | 26 |
| 3 | 28 | 26 |
| 4 | 28 | 26 |
| 5 | 28 | 26 |
| 6 | 28 | 26 |
| 7 | 28 | 26 |
| 8 | 28 | 26 |
| 9 | 28 | 26 |
| 10 | 28 | 26 |
| 11 | 28 | 26 |
| 12 | 28 | 26 |
| 13 | 28 | 26 |
| 14 | 28 | 26 |
| 15 | 28 | 26 |
| 16 | 28 | 26 |
| 17 | 28 | 26 |
| 18 | 28 | 26 |
| 19 | 28 | 26 |
| 20 | 28 | 26 |
| 21 | 28 | 26 |
| 22 | 28 | 26 |
| 23 | 28 | 26 |
| 24 | 28 | 26 |
| 25 | 28 | 26 |
| 26 | 28 | 26 |
| 27 | 28 | 26 |
| 28 | 28 | 26 |
| 29 | 28 | 26 |
| 30 | 28 | 26 |
How November really feels in Ko Samui
Once humidity and wind are folded in, November averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
November sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ko Samui weather by month
How November compares with the rest of the year at a glance. November is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 26° | 76 | 9.4 | 11.5 | 6.7 |
| Feb | 27° / 26° | 35 | 5.3 | 11.7 | 7.3 |
| Mar | 28° / 27° | 88 | 8.4 | 11.9 | 6.4 |
| Apr | 29° / 28° | 95 | 11.7 | 12.2 | 5.3 |
| May | 29° / 27° | 116 | 21.2 | 12.4 | 3.8 |
| Jun | 29° / 27° | 89 | 18.8 | 12.5 | 3.9 |
| Jul | 29° / 27° | 84 | 18.4 | 12.5 | 4.2 |
| Aug | 29° / 27° | 91 | 18 | 12.3 | 4.3 |
| Sep | 28° / 27° | 140 | 22.8 | 12.1 | 3.9 |
| Oct | 28° / 26° | 286 | 26 | 11.8 | 3.9 |
| Nov | 28° / 26° | 289 | 20.9 | 11.6 | 4.6 |
| Dec | 27° / 26° | 145 | 13.2 | 11.5 | 5.9 |
Cloud cover in November
The sky is clear or mostly clear about 19% of the time in November.
Beyond those clear spells, partly cloudy skies cover about 15% of November, with mostly cloudy or overcast conditions the remaining 66%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 27 | 28 | 29 | 29 | 31 | 31 | 31 | 33 | 33 | 33 | 33 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 36 | 36 | 35 | 35 | 35 | 36 | 37 | 37 |
| Cloudier (%) | 73 | 72 | 71 | 71 | 69 | 69 | 69 | 67 | 67 | 67 | 67 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 64 | 64 | 65 | 65 | 65 | 64 | 63 | 63 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 27 | 73 |
| 2 | 28 | 72 |
| 3 | 29 | 71 |
| 4 | 29 | 71 |
| 5 | 31 | 69 |
| 6 | 31 | 69 |
| 7 | 31 | 69 |
| 8 | 33 | 67 |
| 9 | 33 | 67 |
| 10 | 33 | 67 |
| 11 | 33 | 67 |
| 12 | 35 | 65 |
| 13 | 35 | 65 |
| 14 | 35 | 65 |
| 15 | 35 | 65 |
| 16 | 35 | 65 |
| 17 | 35 | 65 |
| 18 | 35 | 65 |
| 19 | 35 | 65 |
| 20 | 35 | 65 |
| 21 | 35 | 65 |
| 22 | 35 | 65 |
| 23 | 36 | 64 |
| 24 | 36 | 64 |
| 25 | 35 | 65 |
| 26 | 35 | 65 |
| 27 | 35 | 65 |
| 28 | 36 | 64 |
| 29 | 37 | 63 |
| 30 | 37 | 63 |
Chance of precipitation in November
Ko Samui gets around 289 mm of rain over 20.9 wet days in November, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 70% and peaks near 79% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 79 | 78 | 77 | 77 | 76 | 75 | 75 | 74 | 74 | 74 | 73 | 73 | 73 | 72 | 71 | 71 | 70 | 69 | 69 | 68 | 67 | 66 | 65 | 64 | 63 | 62 | 61 | 60 | 59 | 58 |
| Rain chance (%) | |
|---|---|
| 1 | 79 |
| 2 | 78 |
| 3 | 77 |
| 4 | 77 |
| 5 | 76 |
| 6 | 75 |
| 7 | 75 |
| 8 | 74 |
| 9 | 74 |
| 10 | 74 |
| 11 | 73 |
| 12 | 73 |
| 13 | 73 |
| 14 | 72 |
| 15 | 71 |
| 16 | 71 |
| 17 | 70 |
| 18 | 69 |
| 19 | 69 |
| 20 | 68 |
| 21 | 67 |
| 22 | 66 |
| 23 | 65 |
| 24 | 64 |
| 25 | 63 |
| 26 | 62 |
| 27 | 61 |
| 28 | 60 |
| 29 | 59 |
| 30 | 58 |
Humidity in November
Most of November feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, November lands in the oppressive band about 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 |
| Oppressive (%) | 79 | 79 | 79 | 79 | 79 | 78 | 77 | 76 | 75 | 74 | 72 | 71 | 70 | 69 | 69 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 70 | 71 | 70 | 71 | 71 | 71 | 71 | 71 |
| Miserable (%) | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 22 | 23 | 24 | 26 | 27 | 28 | 29 | 29 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 27 | 26 | 26 | 25 | 24 | 24 | 23 | 23 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 1 | 79 | 20 |
| 2 | 1 | 79 | 20 |
| 3 | 1 | 79 | 20 |
| 4 | 1 | 79 | 20 |
| 5 | 1 | 79 | 20 |
| 6 | 2 | 78 | 20 |
| 7 | 2 | 77 | 21 |
| 8 | 2 | 76 | 22 |
| 9 | 2 | 75 | 23 |
| 10 | 2 | 74 | 24 |
| 11 | 2 | 72 | 26 |
| 12 | 2 | 71 | 27 |
| 13 | 2 | 70 | 28 |
| 14 | 2 | 69 | 29 |
| 15 | 2 | 69 | 29 |
| 16 | 2 | 68 | 30 |
| 17 | 2 | 68 | 30 |
| 18 | 2 | 68 | 30 |
| 19 | 2 | 69 | 29 |
| 20 | 2 | 69 | 29 |
| 21 | 3 | 69 | 28 |
| 22 | 3 | 69 | 28 |
| 23 | 3 | 70 | 27 |
| 24 | 3 | 71 | 26 |
| 25 | 4 | 70 | 26 |
| 26 | 4 | 71 | 25 |
| 27 | 5 | 71 | 24 |
| 28 | 5 | 71 | 24 |
| 29 | 6 | 71 | 23 |
| 30 | 6 | 71 | 23 |
Wind in November
Winds average 17 km/h in November.
Across November, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 16 | light breeze |
| 2 | 16 | light breeze |
| 3 | 16 | light breeze |
| 4 | 16 | light breeze |
| 5 | 16 | light breeze |
| 6 | 16 | light breeze |
| 7 | 16 | light breeze |
| 8 | 16 | light breeze |
| 9 | 16 | light breeze |
| 10 | 16 | light breeze |
| 11 | 16 | light breeze |
| 12 | 16 | light breeze |
| 13 | 16 | light breeze |
| 14 | 16 | light breeze |
| 15 | 16 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 17 | light breeze |
| 27 | 18 | light breeze |
| 28 | 18 | light breeze |
| 29 | 18 | light breeze |
| 30 | 18 | light breeze |
Sunrise & sunset in November
Daylight runs from about 11 h 42 min at the start of November to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 12 minutes over November. Sunrise moves from 6:14 AM to 6:25 AM, and sunset from 5:54 PM to 5:54 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.7 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 |
| Sunrise (AM) | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:15 | 6:16 | 6:16 | 6:16 | 6:17 | 6:17 | 6:17 | 6:18 | 6:18 | 6:18 | 6:19 | 6:19 | 6:20 | 6:20 | 6:20 | 6:21 | 6:21 | 6:22 | 6:22 | 6:23 | 6:23 | 6:24 | 6:24 | 6:25 | 6:25 |
| Sunset (PM) | 5:54 | 5:53 | 5:53 | 5:53 | 5:53 | 5:53 | 5:53 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:52 | 5:53 | 5:53 | 5:53 | 5:53 | 5:53 | 5:53 | 5:54 | 5:54 | 5:54 | 5:54 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.7 | 6:14 | 5:54 |
| 2 | 11.6 | 6:14 | 5:53 |
| 3 | 11.6 | 6:15 | 5:53 |
| 4 | 11.6 | 6:15 | 5:53 |
| 5 | 11.6 | 6:15 | 5:53 |
| 6 | 11.6 | 6:15 | 5:53 |
| 7 | 11.6 | 6:16 | 5:53 |
| 8 | 11.6 | 6:16 | 5:52 |
| 9 | 11.6 | 6:16 | 5:52 |
| 10 | 11.6 | 6:17 | 5:52 |
| 11 | 11.6 | 6:17 | 5:52 |
| 12 | 11.6 | 6:17 | 5:52 |
| 13 | 11.6 | 6:18 | 5:52 |
| 14 | 11.6 | 6:18 | 5:52 |
| 15 | 11.6 | 6:18 | 5:52 |
| 16 | 11.6 | 6:19 | 5:52 |
| 17 | 11.6 | 6:19 | 5:52 |
| 18 | 11.5 | 6:20 | 5:52 |
| 19 | 11.5 | 6:20 | 5:52 |
| 20 | 11.5 | 6:20 | 5:52 |
| 21 | 11.5 | 6:21 | 5:53 |
| 22 | 11.5 | 6:21 | 5:53 |
| 23 | 11.5 | 6:22 | 5:53 |
| 24 | 11.5 | 6:22 | 5:53 |
| 25 | 11.5 | 6:23 | 5:53 |
| 26 | 11.5 | 6:23 | 5:53 |
| 27 | 11.5 | 6:24 | 5:54 |
| 28 | 11.5 | 6:24 | 5:54 |
| 29 | 11.5 | 6:25 | 5:54 |
| 30 | 11.5 | 6:25 | 5:54 |
Solar energy in November
Average shortwave solar energy reaching the ground each day in November, about 4.49 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 6.44 kWh/m² in April across the year — November's 4.49 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.5 | Bright |
| 2 | 4.5 | Bright |
| 3 | 4.5 | Bright |
| 4 | 4.5 | Bright |
| 5 | 4.5 | Bright |
| 6 | 4.5 | Bright |
| 7 | 4.5 | Bright |
| 8 | 4.5 | Bright |
| 9 | 4.5 | Bright |
| 10 | 4.5 | Bright |
| 11 | 4.5 | Bright |
| 12 | 4.5 | Bright |
| 13 | 4.5 | Bright |
| 14 | 4.5 | Bright |
| 15 | 4.5 | Bright |
| 16 | 4.5 | Bright |
| 17 | 4.5 | Bright |
| 18 | 4.5 | Bright |
| 19 | 4.5 | Bright |
| 20 | 4.5 | Bright |
| 21 | 4.5 | Bright |
| 22 | 4.5 | Bright |
| 23 | 4.5 | Bright |
| 24 | 4.5 | Bright |
| 25 | 4.5 | Bright |
| 26 | 4.5 | Bright |
| 27 | 4.5 | Bright |
| 28 | 4.5 | Bright |
| 29 | 4.5 | Bright |
| 30 | 4.5 | Bright |
Hazard calendar for Ko Samui
In November, Ko Samui sits inside its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.
Ko Samui sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Ko Samui's rainy season runs September–December, when most of the year's rain falls.
Is November a good time to visit Ko Samui?
Our two travel scores rate November for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
November is a reasonable time to visit Ko Samui for sightseeing.
What to pack for Ko Samui in November
From November's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In November, Ko Samui sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. About 21 days see rain.
Sea temperature near Ko Samui in November
The nearest coast averages about 29°C in November — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in May at about 30°C and coldest in January near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Ko Samui in November
Clear-sky midday UV in November peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ko Samui peaks around August 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 10 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 12 | 13 | 13 | 13 | 12 | 11 | 14 | 13 | 11 | 10 | 10 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Very high |
Air quality in Ko Samui in November
Average fine-particle pollution (PM2.5) through the year — so you can see where November falls, not just the annual average.
Air quality in Ko Samui is worst in January — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 15 | 13 | 14 | 13 | 14 | 15 | 12 | 12 | 11 | 10 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 15 | Moderate |
| Mar | 13 | Moderate |
| Apr | 14 | Moderate |
| May | 13 | Moderate |
| Jun | 14 | Moderate |
| Jul | 15 | Moderate |
| Aug | 12 | Good |
| Sep | 12 | Good |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 12 | Moderate |
Where is Ko Samui?
Ko Samui sits at 9.5°N, 99.9°E, 8 m above sea level, in Thailand. The nearest listed city is Ko Pha-ngan, 27 km away.
Topography around Ko Samui
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ko Samui.
Within 3 km, the terrain around Ko Samui has significant variations in elevation — a maximum elevation change of 476 m around an average of 56 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 629 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,358 m.
The land around Ko Samui is covered by trees (51%) and water (42%) within 3 km, water (72%) and trees (24%) within 16 km, and water (82%) within 80 km.
Thailand travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C
- 230 V · 50 Hz
- Prices
- ≈ 31% of US
- price level, 2025
- GDP per capita
- $8,057
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Homicide rate
- 4.8
- per 100k, 2011
- Road deaths
- 32.2
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 402
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ko Samui (9.5357°, 99.9357°, elevation 8 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).