10-day forecast — Koh Samui
Refreshed hourly
Thu · Today · 12 Nov
Showers
80°
77°
1.77 in
Wind13 mph E
Gusts22 mph
UV index10 – Very high
Precip chance91%
Sunrise6:12 AM
Sunset5:55 PM
Fri · Tomorrow · 13 Nov
Showers
80°
77°
1.73 in
Wind9 mph E
Gusts18 mph
UV index8 – Very high
Precip chance92%
Sunrise6:13 AM
Sunset5:55 PM
Saturday · 14 Nov
Showers
83°
78°
0.49 in
Wind8 mph SE
Gusts16 mph
UV index8 – High
Precip chance88%
Sunrise6:13 AM
Sunset5:55 PM
Sunday · 15 Nov
Showers
83°
80°
0.19 in
Wind4 mph SE
Gusts9 mph
UV index10 – Very high
Precip chance80%
Sunrise6:13 AM
Sunset5:55 PM
Monday · 16 Nov
Showers
84°
79°
0.11 in
Wind3 mph W
Gusts7 mph
UV index6 – High
Precip chance72%
Sunrise6:14 AM
Sunset5:55 PM
Tuesday · 17 Nov
Showers
84°
80°
0.09 in
Wind7 mph SE
Gusts14 mph
UV index7 – High
Precip chance70%
Sunrise6:14 AM
Sunset5:55 PM
Wednesday · 18 Nov
Showers
83°
79°
0.65 in
Wind9 mph E
Gusts19 mph
UV index7 – High
Precip chance83%
Sunrise6:14 AM
Sunset5:55 PM
Thursday · 19 Nov
Showers
83°
79°
0.74 in
Wind11 mph E
Gusts23 mph
UV index6 – High
Precip chance84%
Sunrise6:15 AM
Sunset5:55 PM
Friday · 20 Nov
Showers
83°
79°
0.14 in
Wind8 mph E
Gusts22 mph
UV index6 – High
Precip chance76%
Sunrise6:15 AM
Sunset5:55 PM
Saturday · 21 Nov
Showers
81°
79°
0.26 in
Wind7 mph E
Gusts19 mph
UV index6 – High
Precip chance86%
Sunrise6:16 AM
Sunset5:55 PM
Sunday · 22 Nov
Showers
80°
78°
0.84 in
Wind11 mph E
Gusts20 mph
UV index6 – High
Precip chance90%
Sunrise6:16 AM
Sunset5:55 PM
Monday · 23 Nov
Showers
83°
77°
0.93 in
Wind7 mph E
Gusts17 mph
UV index6 – High
Precip chance84%
Sunrise6:17 AM
Sunset5:55 PM
Tuesday · 24 Nov
Showers
82°
78°
0.09 in
Wind4 mph NE
Gusts13 mph
UV index7 – High
Precip chance68%
Sunrise6:17 AM
Sunset5:55 PM
Wednesday · 25 Nov
Showers
83°
80°
0.21 in
Wind7 mph NE
Gusts19 mph
UV index6 – High
Precip chance80%
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 40)
Details & indices
Wind
9 mph E
Gusts 18 mph
Humidity
93%
Dew point 76°
Pressure
29.94 inHg
Rising
UV index
10 — Very high
High today
Air Quality
Good
AQI 40 · US EPA
Visibility
4 mi
Reduced
Sun & moon
Sunrise6:12 AM
Sunset5:55 PM
Length of day11h 43m
Moonrise8:50 AM
Moonset8:34 PM
Moon phase🌔 Waxing Crescent
Local time11:45 PM (+07:00)
Koh Samui climate in July
8-year averages · when to visitBest months: January–December · July: Good
| June | July | August | |
|---|---|---|---|
| Average temperature | → 79°F | 79°F | → 79°F |
| Typical high | → 84°F | 84°F | → 84°F |
| Typical low | → 75°F | 75°F | ▼ 73°F |
| Water temperature | ▼ 88°F | 87°F | ▲ 88°F |
| Precipitation | ▲ 3.0 in | 3.8 in | ▼ 3.6 in |
| Wet days | ▲ 17 d | 18 d | ▲ 19 d |
| Humidity | ▲ 75% | 77% | ▲ 79% |
| Sunshine per day | ▼ 9.9 h | 9.1 h | ▲ 9.4 h |
| Cloud cover | ▲ 22% | 28% | ▼ 24% |
| Midday UV | ▲ 11 | 12 | → 12 |
| Daylight | 12:40 | 12:37 | 12:26 |
| Our take | Good | Good | Good |
July temperatures day by day daily mean + smoothed trend · °F
July precipitation day by day in
July 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: 11:45 PM
Koh Samui, Thailand · 9.51°N, 100.01°E · Asia/Bangkok · Forecast computed for these exact coordinates