What to expect from the weather in Koh Samui
Gulf of Thailand & Andaman Sea
DIFFERENT WEATHER ON DIFFERENT PARTS OF THAILAND
The weather in the Gulf of Thailand is quite different from the weather in the Andaman Sea. There are different seasons depending on the region. Temperature ranges from 23°C to 32°C all year around in both Andaman Sea & Gulf of Thailand, but there are important differences in precipitation. Comparing the weather in Koh Samui with the weather in Phuket, average rainfall shows November is the rainiest month in Koh Samui. September in Phuket.
Check the graphs below comparing precipitation in Koh Samui with precipitation in Phuket. There is as well details on precipitation in Bangkok and Chiang Mai. Data is provided by the Thai Meteorological Department for year 2018
Weather in Koh Samui by Season
WHEN IS THE BEST TIME TO VISIT KOH SAMUI?
There is a proverb in Thailand that says seasons are 3:
Hot Season – Hotter Season – Hottest Season
Being a tropical island, the weather in Koh Samui is pleasant with good temperature all year around, and rain can be unpredictable. The easiest way to describe the Koh Samui weather is through three seasons:
Best time to visit Koh Samui
You need to ask yourself what is more important to you between, heat, rain, prices, holiday plan and how busy you prefer the island to be.
For instance, November is the wettest month of the year. Still, some holiday makers, looking to relax doing activities like yoga retreats or SPA indulgence, chose to visit Koh Samui during this month because the island is quiet and prices are lower. However, if you are coming from a country with cold or rainy weather conditions looking for sun, probably is better to skip the rainy season and chose to visit during the dry or hot season.
The best time to visit Koh Samui will depend on your own preferences, here you can find some tips and suggestions, but if you have questions feel free to contact us.
In the map below you can find some live cams set around the island so you can check the Koh Samui weather yourself in real time. Make sure you look at Thai daylight timing (+7GTM). Note: some of the live cams may not work temporarily while they are serviced
From Early January to Mid April
The dry season is for many visitors the best time to visit Koh Samui. The weather is usually pleasant, not too hot and without much rain. Be prepared to see some of the most amazing sunset you have ever seen. During the dry season Koh Samui can get busy with Saint Valentine, Chinese New Year and Songkran so make sure you book in advance to avoid disappointment.
Mid April to end of September
The hot season is
October to Early January
In Koh Samui, you won't need more than your shorts and flip flops to walk around anytime. Good temperatures all year around means you can enjoy Koh Samui during the rainy season if you want to explore the island and relax without too many tourists around, don't expect to get a nice tan though... Note- Christmas in Koh Samui is very popular, make sure you book in advance!