Geography of Koh Samui
Geography of Koh Samui: location, coordinates, elevation, terrain and the places around it.
Geography of Koh Samui
Khao Sok National Park is 110 mi to the west, Railay Beach is 131 mi to the south-west, Phuket International Airport is 151 mi to the south-west and Maya Bay is 153 mi to the south-west.
Map of Koh Samui
Interactive map with nearby places. Switch between street, terrain and satellite views.
Coordinates: 9°30′43.2″N 100°0′49″E (9.512, 100.0136)
Quick facts about Koh Samui
Summary
Koh Samui is an island in Thailand. Koh Samui is an island known for palm-fringed beaches in the Gulf.
Right now it is 80°F (27°C) in Koh Samui with overcast. It feels like 86°F. Today runs from 75°F to 85°F. Chance of precipitation is 41%. Sightseeing conditions score 8.4/10 - good conditions.
The best time to visit Koh Samui is January, February, March and April. The climate is temperate. October, November and December tend to be the least comfortable months. April is the warmest month with average highs near 86°F, while January is the coldest with lows near 72°F.
The closest major airport is Phuket International Airport (HKT), about 151 mi away. Nearby highlights include Khao Sok National Park, Railay Beach, Maya Bay and Phuket.
In plain terms. Today is about average for August. The forecast high of 85°F is in line with the 84°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Koh Samui today at 9/10. Gusts to 31 mph will push high-sided vehicles on exposed roads and bridges.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Climate in Koh Samui month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 79° | 72° | 2,3 in | ★★★★☆ |
| February | 81° | 73° | 2,6 in | ★★★★☆ |
| March | 83° | 74° | 1,3 in | ★★★★★ |
| April | 86° | 76° | 1,9 in | ★★★★☆ |
| May | 85° | 75° | 5,5 in | ★★★★☆ |
| June | 86° | 75° | 3,3 in | ★★★★☆ |
| July | 85° | 75° | 4,1 in | ★★★★☆ |
| August | 84° | 74° | 3,8 in | ★★★★☆ |
| September | 82° | 74° | 5,0 in | ★★★★☆ |
| October | 81° | 73° | 9,3 in | ★★★☆☆ |
| November | 79° | 72° | 11,9 in | ★★★☆☆ |
| December | 79° | 72° | 7,2 in | ★★★☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Explore Koh Samui
Every topic we hold for this place, and the same topic for the places around it.
Geography for related places
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 right now?
It is currently 80°F (27°C) with overcast. Humidity is 76% and wind is 8 mph.
When is the best time to visit Koh Samui?
January, February, March and April offer the most comfortable conditions in Koh Samui, which has a temperate climate. October, 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 11:38 AM.
What is the nearest airport to Koh Samui?
The closest airports are Phuket International Airport (HKT), 151 mi away and Suvarnabhumi Airport (BKK), 293 mi away.
What are the top things to do in Koh Samui?
Popular options include Khao Sok National Park, Railay Beach, Maya Bay, Phuket and Langkawi.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Map tiles | OpenStreetMap contributors, CARTO and Esri. |
| Elevation | Open-Meteo digital elevation model where the dataset has no value. |
| 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 August 23, 2026 at 11:38 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
