Destination forecast
Koh Samui, Thailand
Asia/Bangkok · 9.51, 100.01
See which of the next seven days are mostly rain-free, how much rain is expected and the temperature range, then compare other destinations across Thailand.
Direct weather answer
Koh Samui rain outlook for the next 7 days
Rain is possible on all 7 forecast days in Koh Samui.
There is no clear rain-free window right now, so keep a backup plan for outdoor activities.
- Forecast period
- Aug 26–Sep 1
- Expected precipitation
- 31.2 mm
A day counts as mostly rain-free only when the daily condition is not rain, drizzle or showers and expected precipitation stays within the site threshold.
Forecast updated Sep 1, 2026, 12:00 UTC · Forecast source: Open-Meteo
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Weather now
Current condition
Light drizzle
- Temperature
- 24.3°C / 29.1°C
- Peak rain chance
- 34%
Updated
Travel Score
- Comfortable Temperature
- High UV Caution
Plan the days
7-day trip outlook
Dates and weather use Asia/Bangkok
Today
Light drizzle
24.3° / 29.1°
34% peak rain56ScoreTomorrow
Rain showers
23.7° / 29.8°
83% peak rain38ScoreDay 3
Thunderstorm
22.5° / 28.2°
86% peak rain37ScoreDay 4
Rain showers
23° / 27°
84% peak rain44ScoreDay 5
Drizzle
23° / 26.7°
76% peak rain45ScoreDay 6
Drizzle
22.9° / 26.6°
67% peak rain52ScoreDay 7
Thunderstorm
23.6° / 28.2°
56% peak rain50Score
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