Koh Samui weather live forecast

Today's maximum temperature in Koh Samui is expected to be 86°F. Select a day from the live weather forecast for Koh Samui, Thailand for more weather parameters.

Friday
13th Feb
86

79

6

11
Saturday
14th Feb
84

81

6

11
Sunday
15th Feb
86

81

5

10
Monday
16th Feb
86

81

5

11
Tuesday
17th Feb
86

79

7

11

5-day weather forecast updated at 04:01 on Friday 13th February 2026 GMT

More about Koh Samui

Koh Samui by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Thailand

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

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 13th 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 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the south-east.

86
°F maximum temperature
79
°F minimum temperature
scattered clouds
6
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
M
moderate heat & humidity
11
mph wind from SE

Koh Samui weather for Saturday 14th February 2026

Expect isolated thunderstorms in Koh Samui, Thailand with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 9 mph from the south-east.

84
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
55
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
9
mph wind from SE

Koh Samui weather for Sunday 15th February 2026

Expect isolated thunderstorms in Koh Samui, Thailand with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a gentle breeze of 8 mph from the south-east.

86
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
5
hours of sunshine
10
UV index (Very High)
44
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
8
mph wind from SE

Koh Samui weather for Monday 16th 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 10-20 mm of rainfall expected with 78% chance of some rain and a gentle breeze of 9 mph from the east.

86
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
78
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
9
mph wind from E

Koh Samui weather for Tuesday 17th 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 7 hours of bright sunshine. There are 10-20 mm of rainfall expected with 67% chance of some rain and a moderate breeze of 13 mph from the south-east.