Koh Samui weather live forecast

Today's maximum temperature in Koh Samui is expected to be 90°F. Select a day from the live weather forecast for Koh Samui, Thailand for more weather parameters.

Friday
6th Feb
90

77

7

11
Saturday
7th Feb
86

79

7

11
Sunday
8th Feb
86

79

5

11
Monday
9th Feb
86

79

4

11
Tuesday
10th Feb
86

79

5

11

5-day weather forecast updated at 04:02 on Friday 6th February 2026 GMT

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The 5-day weather forecast for Thailand (Koh Samui) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Koh Samui weather forecast by day

Below are the detailed weather forecasts for Koh Samui for the next 5 days.

Koh Samui weather for Friday 6th February 2026

Expect scattered clouds in Koh Samui, Thailand with a maximum temperature of 90°F, high levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south-east.

90
°F maximum temperature
77
°F minimum temperature
scattered clouds
7
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
H
high heat & humidity
6
mph wind from SE

Koh Samui weather for Saturday 7th February 2026

Expect scattered clouds in Koh Samui, Thailand with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south-east.

86
°F maximum temperature
79
°F minimum temperature
scattered clouds
7
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from SE

Koh Samui weather for Sunday 8th February 2026

Expect isolated thunderstorms in Koh Samui, Thailand with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 36% chance of some rain and a moderate breeze of 13 mph from the south-east.

86
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
36
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
13
mph wind from SE

Koh Samui weather for Monday 9th February 2026

Expect isolated thunderstorms in Koh Samui, Thailand with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 62% chance of some rain and a moderate breeze of 15 mph from the south-east.

86
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
4
hours of sunshine
11
UV index (Extreme)
62
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
15
mph wind from SE

Koh Samui weather for Tuesday 10th February 2026

Expect broken clouds in Koh Samui, Thailand with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the south-east.