When is the best time to go to Koh Samui?

When is the best time to go to Koh Samui? Here's some information to help you in your decision:

  • On the island of Koh Samui, the weather is good everywhere in February, March, April, May, July and August
  • The best months to go to Chaweng Beach are February, March, April, May, July and August
  • On average, it is hot all year round in Chaweng Beach
  • November is the wettest month in this city
  • The cities with the best climate are Chaweng Beach, Bang Kao (Laem Sor beach), Bophut, Choeng Mon, Koh Madsum, Koh Taen, Lamai beach, Lipa Noi, Maenam and Nathon, with good weather at least 6 months a year
  • The sea temperature is suitable for swimming all year round in Chaweng Beach


Annual weather on the island of Koh Samui

For information about the climate and the weather city by city on the island of Koh Samui for a specific month, click on the corresponding line below:

January 81°F to 83°F
10 to 11 days*
February 83°F
5 days
March 85°F
6 to 7 days*
April 86°F
8 to 9 days*
May 88°F
11 to 14 days*
June 86°F
12 to 15 days*
July 86°F
11 to 14 days*
August 86°F
9 to 14 days*
September 85°F
12 to 16 days*
October 85°F
18 to 19 days*
November 85°F
21 days
December 85°F
14 to 15 days*
* weather varies across the country

Best time to travel to Koh Samui by cities

Chargement en cours


Temperatures and rainfall on the island of Koh Samui

On these 3 graphs, we present the evolution of temperatures of Koh Samui and month-by-month rainfall for the cities of Chaweng Beach, Bang Kao (Laem Sor beach), Bophut, Choeng Mon and Koh Madsum, as well as the month-by-month sea temperature for coastal cities.


Peak visitor numbers and tourist seasons on the island of Koh Samui

Find out when Koh Samui has its high tourist season (the period when the influx of tourists is highest) and off-peak tourist season using our data and figures.

Tourist seasons on the island of Koh Samui

The months with low numbers of tourists are: March, April, May, June, September, October and November. The number of visitors to Koh Samui is high in: January, February, July, August and December.

  • Very low season on the island of Koh Samui: October and November.
  • Low season on the island of Koh Samui: March, April, May, June and September.
  • High season on the island of Koh Samui: January, February, July and December.
  • Peak season on the island of Koh Samui: August.

Figure: Visitor index for Koh Samui month by month




Where to go on the island of Koh Samui?

This table allows you to see the maximum temperature for each city and our opinion on the weather month by month (see colour legend below the table).

Cities jan.feb.mar.apr.mayjun.jul.aug.sep.oct.nov.dec.
Chaweng Beach83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Bang Kao (Laem Sor beach)83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Bophut83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Choeng Mon83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Koh Madsum83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Koh Phaluai83°F83°F85°F86°F88°F86°F86°F86°F85°F85°F85°F85°F
Koh Taen83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Lamai beach83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Lipa Noi83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Maenam83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F
Nathon83°F83°F85°F86°F88°F86°F86°F86°F86°F85°F85°F85°F

Legend:

good weather

tolerable weather

very bad weather


About Koh Samui

What can I do on the island of Koh Samui?

Beaches / swimming

Nature and countryside

Culture and heritage

Sports

Family travel

Crafts / shopping

Gastronomy

Nightlife




Is this weather information for Koh Samui reliable?

Climate data for Koh Samui has been gathered every day since January 2009. The analysis of these meteorological data for Koh Samui allows us to determine the average for each month in Chaweng Beach, Bang Kao (Laem Sor beach), Bophut, Choeng Mon, Koh Madsum, Koh Phaluai, Koh Taen, Lamai beach, and 3 other cities.

So yes: this data is reliable except in cases of temporary climate disruption in the region.

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