Koh Samui weather in January

January is a good time to visit Koh Samui as it falls during the dry season.

You can expect clear sunny days with little to no rain, light sea breezes and calm seas. Daytime temperatures average 27°C (80°F).

How hot is it in Koh Samui in January?
Daytime temperatures in Koh Samui in January reach an average high of 30°C (86°F) with high heat and humidity, falling to a night-time low of 26°C (78°F).

How sunny is it in Koh Samui in January?
There are normally seven hours of bright sunshine each day in Koh Samui in January – that's around 64% of daylight hours.

Sunrise & sunset in January?
Sunrise is around 6:40am with sunset around 6:20pm.

How warm is the sea around Koh Samui in January?
The average sea temperature in Koh Samui in January is 28°C (82°F).

Does it rain in Koh Samui in January?
There are usually eight days with some rain in Koh Samui in January; the average monthly rainfall is 184mm (7in).

How windy is it in Koh Samui in January?
January sees an average hourly wind speed of 16 kilometres per hour (10 mph; 8.6 knots).

What to do in Koh Samui in January?
January is a great time of the year for exploring Koh Samui on foot as well as enjoying the warm seawater with swimming, snorkelling and kayaking.

Typically in January, wind conditions on the west coast are better for swimming while the east coast is best for wind surfing.

Local holidays?
New Year's Day – 1st Jan.

January is high season in Koh Samui, with higher hotel prices and the need to book early, especially during the New Year holiday period.

Koh Samui weather in January

Temperature icon High Temp: 30°C (86°F)
temperature icon Low Temp: 26°C (78°F)
sun icon Sunshine: 7 hours per day
Moderately hot icon
Daylight: 12 hours per day
wind icon Wind speed: 16 km/h (10 mph; 8.6 knots)
umbrella icon Wet Days: 8 days with some rain
rain cloud Rainfall: 184 mm (7 in) per month
High heat icon Comfort Level: High heat & 83% humidity
Moderately hot icon
UV Index: Extreme
swimming icon Sea Temp: 28°C (82°F)
Koh Samui, Thailand

Best time to visit Koh Samui

The best time to visit Koh Samui is during January and February.

However, anytime during the dry season from mid-December through to early-March is good, with daytime temperatures averaging 28°C (82°F).

For more climate info: Koh Samui weather overview

Koh Samui weather by month

Source: Meteorological data for Koh Samui is based on weather statistics gathered for the 10-year period 2012 to 2021 by the Thai Meteorological Department at the closest weather station: Koh Samui Airport, (USM), located about 2km north of Chaweng.

Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.

Latest update: Koh Samui weather in January: 12 June, 2024

Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.