Koh Samui weather live forecast

Today's maximum temperature in Koh Samui is expected to be 88°F. Select a day from the live weather forecast for Koh Samui, Thailand for more weather parameters.

Friday
27th Feb
88

79

9

11
Saturday
28th Feb
86

79

8

11
Sunday
1st Mar
88

81

8

11
Monday
2nd Mar
90

81

8

11
Tuesday
3rd Mar
90

81

8

11

5-day weather forecast updated at 04:02 on Friday 27th 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 27th February 2026

Expect isolated thunderstorms in Koh Samui, Thailand with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 9 hours of bright sunshine. There are 10-20 mm of rainfall expected with 57% chance of some rain and a gentle breeze of 8 mph from the west.

88
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
9
hours of sunshine
11
UV index (Extreme)
57
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
8
mph wind from W

Koh Samui weather for Saturday 28th 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 8 hours of bright sunshine. There are 5-10 mm of rainfall expected with 45% chance of some rain and little or no wind of 4 mph from the south-west.

86
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
8
hours of sunshine
11
UV index (Extreme)
45
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
4
mph wind from SW

Koh Samui weather for Sunday 1st March 2026

Expect scattered clouds in Koh Samui, Thailand with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the west.

88
°F maximum temperature
81
°F minimum temperature
scattered clouds
8
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
M
moderate heat & humidity
5
mph wind from W

Koh Samui weather for Monday 2nd March 2026

Expect isolated thunderstorms in Koh Samui, Thailand with a maximum temperature of 90°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 12% chance of some rain and a light breeze of 6 mph from the west.

90
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
8
hours of sunshine
11
UV index (Extreme)
12
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
6
mph wind from W

Koh Samui weather for Tuesday 3rd March 2026

Expect scattered clouds in Koh Samui, Thailand with a maximum temperature of 90°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the west.