Koh Samui Vejr Prognose
Koh Samui weather: 29°C, mest klart. Hver time forecast, 14-day outlook, UV, air quality and the best time og visit.
Will it rain in Koh Samui?
Yes - rain is likely in Koh Samui today.
A 67% chance means rain is expected over most of the area. Plan indoor alternatives.
Over the next 7 days, about 92 mm of precipitation is forecast, med the wettest days falling on man, tir, ons, tor, fre, lør and søn.
Regnfall over the next 7 days is close og normal for oktober (92 mm against a typical 55 mm).
16-day forecast for Koh Samui
Maks. / Min.; Nedbør; UV
| Dag | Forhold | Maks. / Min. | Nedbør | Vind | UV |
|---|---|---|---|---|---|
| man, okt 5 | 🌦️ Light drizzle | 29° / 24° | 67% · 1 mm | 11 km/h | 9 |
| tir, okt 6 | ⛈️ Tordenvejr | 27° / 21° | 96% · 18 mm | 11 km/h | 9 |
| ons, okt 7 | 🌧️ Byger | 26° / 22° | 94% · 14 mm | 11 km/h | 8 |
| tor, okt 8 | ⛈️ Tordenvejr | 26° / 22° | 99% · 14 mm | 10 km/h | 9 |
| fre, okt 9 | 🌦️ Light showers | 25° / 22° | 91% · 7 mm | 16 km/h | 8 |
| lør, okt 10 | 🌦️ Light showers | 25° / 22° | 97% · 15 mm | 11 km/h | 8 |
| søn, okt 11 | 🌦️ Light showers | 26° / 22° | 96% · 23 mm | 7 km/h | 6 |
| man, okt 12 | 🌦️ Light showers | 26° / 22° | 96% · 6 mm | 7 km/h | 4 |
| tir, okt 13 | 🌦️ Støvregn | 26° / 23° | 89% · 8 mm | 8 km/h | 5 |
| ons, okt 14 | 🌦️ Støvregn | 26° / 22° | 96% · 8 mm | 8 km/h | 8 |
| tor, okt 15 | 🌧️ Heavy drizzle | 26° / 22° | 90% · 15 mm | 10 km/h | 8 |
| fre, okt 16 | 🌦️ Light showers | 24° / 22° | 96% · 19 mm | 11 km/h | 7 |
| lør, okt 17 | 🌧️ Heavy drizzle | 25° / 22° | 84% · 16 mm | 13 km/h | 7 |
| søn, okt 18 | 🌦️ Light showers | 23° / 22° | 94% · 22 mm | 12 km/h | 9 |
| man, okt 19 | 🌦️ Støvregn | 25° / 22° | 88% · 8 mm | 11 km/h | 9 |
| tir, okt 20 | 🌦️ Light showers | 26° / 22° | 42% · 8 mm | 11 km/h | 8 |
What this means for Koh Samui
Today is slightly warmer than average for oktober. The forecast high of 29°C is 1.8°C above the 27°C typical for this month.
A 67% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
Within 15 degrees of the equator, day length barely changes all year; seasons are defined by rain, not temperature.
Northern Hemisphere, so peak summer falls in juni og august.
The gap between the warmest and coldest month averages 3°C - an unusually even climate through the year.
What og pack, what og skip
- Lightweight, light-coloured clothing and a refillable water bottle
- sønglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid oktober, november and december - historically the least comfortable months here.
Se prognosen for Koh Samui efter tidsinterval
Koh Samui weather - more answers
Explore Koh Samui
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Frequently asked questions
Where is Koh Samui?
Koh Samui is an island in Thailand. Its coordinates are 9.512, 100.0136. It lies in Asien.
What is the weather like in Koh Samui lige nu?
It is currently 29°C (84°F) med mest klart. Luftfugtighed is 64% and wind is 9 km/h.
When is the best time og visit Koh Samui?
januar, februar, marts and april offer the most comfortable conditions in Koh Samui, which has a temperate climate. oktober, november and december are usually the hardest months for outdoor plans.
What time zone is Koh Samui in?
Koh Samui observes Asia/Bangkok (UTC+07:00). The local time is 3:25 PM.
What is the nearest airport og Koh Samui?
The closest airports are Phuket International Airport (HKT), 243 km away and Suvarnabhumi Airport (BKK), 471 km away.
What are the top things og do in Koh Samui?
Popular options include Khao Sok National Park, Railay Beach, maja Bay and Langkawi.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Prognose and observations | Open-Meteo (ECMWF and national models). |
| Luftkvalitet and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Klima averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated oktober 5, 2026 at 3:25 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
