10-day forecast — Koh Samui
Refreshed hourly
Thu · Today · 12 Nov
Showers
27°
25°
1.50 in
Wind13 mph E
Gusts22 mph
UV index10 – Very high
Precip chance91%
Sunrise6:12 AM
Sunset5:55 PM
Fri · Tomorrow · 13 Nov
Showers
27°
25°
2.47 in
Wind10 mph SE
Gusts16 mph
UV index8 – Very high
Precip chance92%
Sunrise6:13 AM
Sunset5:55 PM
Saturday · 14 Nov
Showers
28°
26°
0.28 in
Wind8 mph SE
Gusts16 mph
UV index8 – High
Precip chance85%
Sunrise6:13 AM
Sunset5:55 PM
Sunday · 15 Nov
Showers
29°
26°
0.17 in
Wind6 mph SE
Gusts11 mph
UV index10 – Very high
Precip chance80%
Sunrise6:13 AM
Sunset5:55 PM
Monday · 16 Nov
Showers
29°
26°
0.11 in
Wind5 mph S
Gusts15 mph
UV index6 – High
Precip chance73%
Sunrise6:14 AM
Sunset5:55 PM
Tuesday · 17 Nov
Showers
29°
26°
0.03 in
Wind9 mph SE
Gusts15 mph
UV index7 – High
Precip chance55%
Sunrise6:14 AM
Sunset5:55 PM
Wednesday · 18 Nov
Showers
28°
27°
0.16 in
Wind9 mph E
Gusts21 mph
UV index6 – High
Precip chance75%
Sunrise6:14 AM
Sunset5:55 PM
Thursday · 19 Nov
Showers
28°
26°
0.48 in
Wind13 mph E
Gusts25 mph
UV index6 – High
Precip chance87%
Sunrise6:15 AM
Sunset5:55 PM
Friday · 20 Nov
Showers
28°
26°
0.63 in
Wind9 mph E
Gusts20 mph
UV index6 – High
Precip chance87%
Sunrise6:15 AM
Sunset5:55 PM
Saturday · 21 Nov
Showers
28°
26°
0.31 in
Wind10 mph SE
Gusts21 mph
UV index6 – High
Precip chance84%
Sunrise6:16 AM
Sunset5:55 PM
Sunday · 22 Nov
Showers
26°
25°
0.92 in
Wind10 mph E
Gusts20 mph
UV index6 – High
Precip chance91%
Sunrise6:16 AM
Sunset5:55 PM
Monday · 23 Nov
Showers
27°
25°
0.48 in
Wind7 mph E
Gusts17 mph
UV index6 – High
Precip chance89%
Sunrise6:17 AM
Sunset5:55 PM
Tuesday · 24 Nov
Showers
28°
26°
0.13 in
Wind5 mph SE
Gusts15 mph
UV index6 – High
Precip chance74%
Sunrise6:17 AM
Sunset5:55 PM
Wednesday · 25 Nov
Showers
28°
26°
0.09 in
Wind3 mph SE
Gusts12 mph
UV index6 – High
Precip chance75%
Sunrise6:17 AM
Sunset5:55 PM
About Koh Samui
CountryThailand
RegionGulf Islands
ContinentAsia
Time zoneAsia/Bangkok (+07:00)
Latitude9.5120°
Longitude100.0140°
Air QualityGood (AQI 39)
Details & indices
Wind
9 mph E
Gusts 17 mph
Humidity
91%
Dew point 24°
Pressure
29.88 inHg
Falling
UV index
10 — Very high
High today
Air Quality
Good
AQI 39 · US EPA
Visibility
6 mi
Clear view
Sun & moon
Sunrise6:12 AM
Sunset5:55 PM
Length of day11h 43m
Moonrise8:50 AM
Moonset8:34 PM
Moon phase🌔 Waxing Crescent
Local time9:52 PM (+07:00)
Koh Samui climate in March
8-year averages · when to visitBest months: January–December · March: Perfect
| February | March | April | |
|---|---|---|---|
| Average temperature | ▲ 24°C | 25°C | ▲ 26°C |
| Typical high | ▲ 26°C | 28°C | ▲ 29°C |
| Typical low | ▲ 22°C | 23°C | ▲ 24°C |
| Water temperature | ▲ 29.4°C | 30.2°C | ▲ 31.5°C |
| Precipitation | ▼ 67 mm | 41 mm | ▲ 97 mm |
| Wet days | ▼ 15 d | 11 d | ▲ 16 d |
| Humidity | ▼ 76% | 75% | ▼ 74% |
| Sunshine per day | ▲ 10.7 h | 11.0 h | ▼ 10.9 h |
| Cloud cover | ▼ 10% | 9% | ▲ 12% |
| Midday UV | ▲ 10 | 11 | ▲ 12 |
| Daylight | 11:49 | 12:04 | 12:20 |
| Our take | Good | Perfect | Good |
March temperatures day by day daily mean + smoothed trend · °C
March precipitation day by day mm
March 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: 9:52 PM
Koh Samui, Thailand · 9.51°N, 100.01°E · Asia/Bangkok · Forecast computed for these exact coordinates