Koh Samui

Koh Samui Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in Koh Samui, Thailand in January.

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Chaweng Beach Lamai Beach Bophut Choeng Mon Beach

Planning a journey to Koh Samui, Thailand this January and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Koh Samui in January

Koh Samui, Thailand is a region in Thailand. January in Koh Samui generally has temperatures that range from warm to very warm, with moderate precipitation.

Temperatures

The average maximum daytime temperatures vary from warm in Chaweng Beach at 28°C (82°F) to very warm in Suratthani at 31°C (88°F). Nighttime temperatures generally drop to 24°C (75°F) in Suratthani and 26°C (79°F) in Chaweng Beach.

To explore the conditions in Koh Samui, Thailand in more detail, check the map below.

Precipitation

In January, precipitation varies across different areas. From moderate rainfall in Suratthani with an average of 76 mm (3 in) to moderate rainfall in Laem Set Beach with 87 mm (3.4 in).

Average sunshine

Many locations offer abundant sunshine during this month. For instance, Chaweng Beach enjoys approximately 200 hours of sunlight, ideal for those seeking sunny weather.

Explore Koh Samui by month

Pick a month to see the average temperature, rainfall and sunshine in Koh Samui — and find the best time to visit. (based on Chaweng Beach)

January28°C (82°F) February29°C (84°F) March30°C (86°F) April30°C (86°F) May31°C (88°F) June31°C (88°F) This monthJuly30°C (86°F) August30°C (86°F) September30°C (86°F) October29°C (84°F) November29°C (84°F) December29°C (84°F)
Best Time to Visit Koh Samui →

Best Places to Visit in Koh Samui in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Koh Samui.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Koh Samui

What is the weather like in January for some of the most popular destinations in Koh Samui, Thailand?

Temperature range in Koh Samui (January)

Precipitation variation in Koh Samui (January)

Chaweng Beach

In January Chaweng Beach generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 26°C (79°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« December
January
February »
December
January
February
Max temperature
29°C (84°F)
28°C (82°F)
29°C (84°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
177 hours
200 hours
215 hours
Monthly rainfall
150 mm (5.9 in)
82 mm (3.2 in)
45 mm (1.8 in)
Monthly rainy days
14 days
9 days
5 days
Weather conditions
pleasant
perfect
perfect
Climate in Chaweng Beach →

Lamai Beach

In January Lamai Beach generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 26°C (79°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« December
January
February »
December
January
February
Max temperature
29°C (84°F)
29°C (84°F)
29°C (84°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
177 hours
200 hours
215 hours
Monthly rainfall
157 mm (6.2 in)
84 mm (3.3 in)
46 mm (1.8 in)
Monthly rainy days
14 days
9 days
5 days
Weather conditions
pleasant
perfect
perfect
Climate in Lamai Beach →

Bophut

In January Bophut generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 26°C (79°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« December
January
February »
December
January
February
Max temperature
29°C (84°F)
28°C (82°F)
29°C (84°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
177 hours
200 hours
215 hours
Monthly rainfall
148 mm (5.8 in)
81 mm (3.2 in)
45 mm (1.8 in)
Monthly rainy days
14 days
9 days
5 days
Weather conditions
pleasant
perfect
perfect
Climate in Bophut →

Choeng Mon Beach

In January Choeng Mon Beach generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 26°C (79°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« December
January
February »
December
January
February
Max temperature
29°C (84°F)
28°C (82°F)
29°C (84°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
177 hours
200 hours
215 hours
Monthly rainfall
147 mm (5.8 in)
81 mm (3.2 in)
45 mm (1.8 in)
Monthly rainy days
14 days
10 days
5 days
Weather conditions
pleasant
perfect
perfect
Climate in Choeng Mon Beach →

Mae Nam Beach

In January Mae Nam Beach generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 26°C (79°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« December
January
February »
December
January
February
Max temperature
29°C (84°F)
28°C (82°F)
29°C (84°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
177 hours
200 hours
215 hours
Monthly rainfall
148 mm (5.8 in)
81 mm (3.2 in)
45 mm (1.8 in)
Monthly rainy days
14 days
9 days
5 days
Weather conditions
pleasant
perfect
perfect
Climate in Mae Nam Beach →

Is your destination not in the list? Have a look at all destinations in Koh Samui, in Thailand.

In our records: Thailand January extremes

Notable January records observed across cities in Thailand in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest January daytime high in Thailand was 10°C (50°F) in Chiang Rai on January 25, 2016.

Popular cities in January

Day & night temperatures, rainfall and average weather in Koh Samui in January.

City Weather Day temp Night temp Rainfall
Chaweng Beach 28°C (82°F) 26°C (79°F) 82 mm (3.2 in)
Lamai Beach 29°C (84°F) 26°C (79°F) 84 mm (3.3 in)
Bophut 28°C (82°F) 26°C (79°F) 81 mm (3.2 in)
Choeng Mon Beach 28°C (82°F) 26°C (79°F) 81 mm (3.2 in)
Mae Nam Beach 28°C (82°F) 26°C (79°F) 81 mm (3.2 in)
Bangrak Beach 28°C (82°F) 26°C (79°F) 82 mm (3.2 in)

Koh Samui weather in January: frequently asked questions

What is the weather like in Koh Samui, Thailand in January?

January in Koh Samui, Thailand brings perfect weather. In Chaweng Beach, daytime temperatures are typically around 28°C (82°F) and nighttime lows hover near 26°C (79°F).

What is the average temperature in Koh Samui, Thailand in January?

Daytime temperatures in Chaweng Beach peak at roughly 28°C (82°F) in January, dropping to about 26°C (79°F) overnight.

Does Koh Samui, Thailand get a lot of rain in January?

Not particularly. Chaweng Beach averages just 82 mm (3.2 in) of rain in January, making it a mostly dry month for Koh Samui, Thailand.

Is January a Good Time to Visit Koh Samui, Thailand?

We consider January to be one of the best times to travel to Koh Samui, Thailand. Typically, the climate in Chaweng Beach is perfect.

Generally speaking, January and February provide perfect weather in Chaweng Beach. On the other hand, the months of October and November tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Koh Samui.

Weather and climate has detailed information for every country in the world. Are you going to Thailand? Get detailed historical weather averages for many cities in Thailand.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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