Koh Samui Loftslag and Average Veður
Loftslag of Koh Samui: average temperatures, rainfall and seasons month by month.
Loftslag in Koh Samui month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Mánuður | Avg high | Avg low | Rigningfall | Rating |
|---|---|---|---|---|
| janúar | 26° | 22° | 58 mm | ★★★★☆ |
| febrúar | 27° | 23° | 66 mm | ★★★★☆ |
| mars | 28° | 24° | 34 mm | ★★★★★ |
| apríl | 30° | 24° | 47 mm | ★★★★☆ |
| maí | 29° | 24° | 140 mm | ★★★★☆ |
| júní | 30° | 24° | 83 mm | ★★★★☆ |
| júlí | 30° | 24° | 105 mm | ★★★★☆ |
| ágúst | 29° | 23° | 129 mm | ★★★★☆ |
| september | 28° | 23° | 105 mm | ★★★★☆ |
| október | 27° | 23° | 235 mm | ★★★☆☆ |
| nóvember | 26° | 22° | 301 mm | ★★★☆☆ |
| desember | 26° | 22° | 182 mm | ★★★☆☆ |
Loftslag type: Temperate. Heimild: Open-Meteo archive (ERA5).
Recent extremes in Koh Samui
Háttest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Koh Samui compares með nearby places
Annual averages, and the difference against Koh Samui.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Khao Sok National Park | 176 km | 26°C | +1°C warmer | 2702 mm |
| Railay Beach | 211 km | 27°C | +2°C warmer | 2044 mm |
| Phuket International Airport | 243 km | 28°C | +3°C warmer | 2195 mm |
| maía Bay | 246 km | 28°C | +3°C warmer | 1965 mm |
| Phuket | 254 km | 28°C | +2°C warmer | 1981 mm |
Best time til visit Koh Samui
Go in janúar, febrúar, mars and apríl. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: október, nóvember and desember - expect the least comfortable mix of heat, cold or rain.
What this means for Koh Samui
Today is about average for október. The forecast high of 28°C is in line með the 27°C typical for this month.
A 96% chance means rain is expected over most of the area. Plan indoor alternatives. Around 10 mm is forecast, which is enough til soak trails and slow traffic.
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 júní til ágúst.
The gap between the warmest and coldest month averages 3°C - an unusually even climate through the year.
What til pack, what til skip
- sun.glasses, 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 október, nóvember and desember - historically the least comfortable months here.
Samantekt
Koh Samui is an island in Taíland. Koh Samui is an island known for palm-fringed beaches in the Gulf.
Núna er hitinn 27°C (80°F) in Koh Samui með skýjað. Hitinn finnst vera 31°C. Í dag er hitinn frá 23°C til 28°C. Líkur á úrkomu eru 96%. Sightseeing conditions score 7.4/10 - góðar aðstæður.
Besti tíminn til að heimsækja Koh Samui is janúar, febrúar, mars and apríl. Loftslagið er temperate. október, nóvember and desember tend til be the least comfortable months. apríl is the warmest month með average highs near 30°C, while janúar is the coldest með lows near 22°C.
The closest major airport is Phuket International Airport (HKT), about 243 km away. Nearby highlights include Khao Sok National Park, Railay Beach, maía Bay and Langkawi.
Í einföldu máli. Today is about average for október. The forecast high of 28°C is in line með the 27°C typical for this month. The best window til be outside is roughly 6 PM til 9 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Koh Samui today at 9.6/10. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Koh Samui
Veður map for Koh Samui
Animated model layers. Pick a layer til load it.
Animated layers by Vindury. For pin-level detail and nearby places, see the interactive map below.
Explore Koh Samui
Every topic we hold for this place, and the same topic for the places around it.
Loftslag for related places
Frequently asked questions
Where is Koh Samui?
Koh Samui is an island in Taíland. Its coordinates are 9.512, 100.0136. It lies in Asía.
What is the weather like in Koh Samui núna?
It is currently 27°C (80°F) með skýjað. Raki is 75% and wind is 4 km/h.
When is the best time til visit Koh Samui?
janúar, febrúar, mars and apríl offer the most comfortable conditions in Koh Samui, which has a temperate climate. október, nóvember 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 2:12 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, maía Bay and Langkawi.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Spá and observations | Open-Meteo (ECMWF and national models). |
| Loftgæði and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Loftslag 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 október 6, 2026 at 2:12 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
