Koh Samui Vær Værmelding
Koh Samui weather: 28°C, mest klart. Time for time forecast, 14-day outlook, UV, air quality and the best time til visit.
Risk assessment for Koh Samui
Derived from the current forecast window - not an official warning.
Peak gusts of 30 km/h and 3 thunderstorm days in the next 16 days.
Wettest single day forecast at 33 mm, 162 mm across the window. Flash flooding risk rises sharply above 50 mm in a day.
16-day forecast for Koh Samui
Maks. / Min.; Nedbør; UV
| Dag | Forhold | Maks. / Min. | Nedbør | Vind | UV |
|---|---|---|---|---|---|
| tor, okt 1 | 🌦️ Light drizzle | 28° / 23° | 78% · 1 mm | 9 km/h | 9 |
| fre, okt 2 | 🌦️ Light showers | 27° / 23° | 82% · 4 mm | 9 km/h | 9 |
| lør, okt 3 | ⛈️ Tordenvær | 27° / 23° | 82% · 4 mm | 11 km/h | 9 |
| søn, okt 4 | 🌦️ Yr | 27° / 24° | 79% · 2 mm | 11 km/h | 9 |
| man, okt 5 | 🌦️ Light drizzle | 27° / 23° | 78% · 3 mm | 11 km/h | 9 |
| tir, okt 6 | ⛈️ Tordenvær | 27° / 22° | 96% · 11 mm | 10 km/h | 8 |
| ons, okt 7 | 🌧️ Heavy drizzle | 27° / 22° | 96% · 10 mm | 8 km/h | 9 |
| tor, okt 8 | 🌧️ Heavy drizzle | 26° / 22° | 94% · 9 mm | 10 km/h | 8 |
| fre, okt 9 | 🌦️ Light drizzle | 27° / 23° | 86% · 4 mm | 10 km/h | 8 |
| lør, okt 10 | 🌦️ Light showers | 26° / 23° | 75% · 8 mm | 9 km/h | 8 |
| søn, okt 11 | 🌦️ Light showers | 26° / 21° | 84% · 18 mm | 9 km/h | 9 |
| man, okt 12 | 🌦️ Yr | 25° / 23° | 90% · 8 mm | 7 km/h | 8 |
| tir, okt 13 | 🌦️ Light showers | 26° / 23° | 90% · 14 mm | 7 km/h | 8 |
| ons, okt 14 | ⛈️ Tordenvær | 26° / 22° | 82% · 22 mm | 6 km/h | 4 |
| tor, okt 15 | 🌦️ Yr | 26° / 22° | 61% · 12 mm | 15 km/h | 7 |
| fre, okt 16 | 🌦️ Light showers | 25° / 23° | 52% · 33 mm | 27 km/h | 9 |
What this means for Koh Samui
Today is about average for oktober. The forecast high of 28°C is in line med the 27°C typical for this month.
A 78% 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 til august.
The gap between the warmest and coldest month averages 3°C - an unusually even climate through the year.
Se prognosen for Koh Samui etter tidsintervall
Koh Samui weather - more answers
Explore Koh Samui
Every topic we hold for this place, and the same topic for the places around it.
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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 Asia.
What is the weather like in Koh Samui akkurat nå?
It is currently 28°C (83°F) med mest klart. Luftfuktighet is 63% and wind is 7 km/h.
When is the best time til visit Koh Samui?
januar, februar, mars and april offer the most comfortable conditions in Koh Samui, which has a temperate climate. oktober, november and desember 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 5:08 PM.
What is the nearest airport til 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 til do in Koh Samui?
Popular options include Khao Sok National Park, Railay Beach, maia Bay and Langkawi.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Værmelding 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 1, 2026 at 5:08 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
