10-day forecast — Koh Samui
Refreshed hourly
Sat · Today · 14 Nov
Showers
84°
78°
0.21 in
Wind8 mph E
Gusts16 mph
UV index11 – Very high
Precip chance83%
Sunrise6:13 AM
Sunset5:55 PM
Sun · Tomorrow · 15 Nov
Showers
83°
80°
0.14 in
Wind4 mph SE
Gusts9 mph
UV index10 – Very high
Precip chance80%
Sunrise6:13 AM
Sunset5:55 PM
Monday · 16 Nov
Showers
83°
80°
0.17 in
Wind4 mph W
Gusts9 mph
UV index11 – Very high
Precip chance80%
Sunrise6:14 AM
Sunset5:55 PM
Tuesday · 17 Nov
Showers
84°
79°
0.16 in
Wind8 mph SE
Gusts15 mph
UV index10 – Very high
Precip chance75%
Sunrise6:14 AM
Sunset5:55 PM
Wednesday · 18 Nov
Showers
83°
78°
0.19 in
Wind11 mph E
Gusts19 mph
UV index10 – Very high
Precip chance80%
Sunrise6:14 AM
Sunset5:55 PM
Thursday · 19 Nov
Showers
83°
80°
0.29 in
Wind12 mph E
Gusts19 mph
UV index6 – High
Precip chance81%
Sunrise6:15 AM
Sunset5:55 PM
Friday · 20 Nov
Showers
83°
79°
0.48 in
Wind11 mph E
Gusts22 mph
UV index6 – High
Precip chance88%
Sunrise6:15 AM
Sunset5:55 PM
Saturday · 21 Nov
Showers
80°
78°
1.10 in
Wind11 mph E
Gusts24 mph
UV index6 – High
Precip chance90%
Sunrise6:16 AM
Sunset5:55 PM
Sunday · 22 Nov
Showers
81°
78°
2.00 in
Wind15 mph E
Gusts28 mph
UV index6 – High
Precip chance91%
Sunrise6:16 AM
Sunset5:55 PM
Monday · 23 Nov
Showers
81°
78°
0.79 in
Wind10 mph E
Gusts21 mph
UV index6 – High
Precip chance88%
Sunrise6:17 AM
Sunset5:55 PM
Tuesday · 24 Nov
Showers
82°
78°
0.10 in
Wind5 mph SE
Gusts14 mph
UV index6 – High
Precip chance77%
Sunrise6:17 AM
Sunset5:55 PM
Wednesday · 25 Nov
Partly cloudy
83°
79°
21%
Wind3 mph E
Gusts12 mph
UV index6 – High
Precip chance21%
Sunrise6:17 AM
Sunset5:55 PM
Thursday · 26 Nov
Showers
83°
80°
0.34 in
Wind11 mph NE
Gusts20 mph
UV index6 – High
Precip chance81%
Sunrise6:18 AM
Sunset5:56 PM
Friday · 27 Nov
Showers
82°
79°
0.41 in
Wind10 mph NE
Gusts19 mph
UV index6 – High
Precip chance88%
Sunrise6:18 AM
Sunset5:56 PM
About Koh Samui
CountryThailand
RegionGulf Islands
ContinentAsia
Time zoneAsia/Bangkok (+07:00)
Latitude9.5120°
Longitude100.0140°
Air QualityGood (AQI 40)
Details & indices
Wind
7 mph SE
Gusts 13 mph
Humidity
84%
Dew point 76°
Pressure
29.94 inHg
Rising
UV index
11 — Very high
High today
Air Quality
Good
AQI 40 · US EPA
Visibility
6 mi
Clear view
Sun & moon
Sunrise6:13 AM
Sunset5:55 PM
Length of day11h 42m
Moonrise10:33 AM
Moonset10:20 PM
Moon phase🌔 First Quarter
Local time9:31 AM (+07:00)
Koh Samui climate in January
8-year averages · when to visitBest months: January–December · January: Good
| December | January | February | |
|---|---|---|---|
| Average temperature | → 75°F | 75°F | → 75°F |
| Typical high | ▲ 77°F | 79°F | → 79°F |
| Typical low | → 72°F | 72°F | → 72°F |
| Water temperature | ▲ 83°F | 84°F | ▲ 85°F |
| Precipitation | ▼ 7.6 in | 3.4 in | ▼ 2.6 in |
| Wet days | ▼ 19 d | 18 d | ▼ 15 d |
| Humidity | ▼ 81% | 77% | ▼ 76% |
| Sunshine per day | ▲ 9.7 h | 10.4 h | ▲ 10.7 h |
| Cloud cover | ▼ 17% | 10% | → 10% |
| Midday UV | → 9 | 9 | ▲ 10 |
| Daylight | 11:35 | 11:38 | 11:49 |
| Our take | Good | Good | Good |
January temperatures day by day daily mean + smoothed trend · °F
January precipitation day by day in
January UV day by day clear-sky midday value
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
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NBM + global weather models
Updated: 9:31 AM
Koh Samui, Thailand · 9.51°N, 100.01°E · Asia/Bangkok · Forecast computed for these exact coordinates