Koh Samui

Koh Samui Weather in May

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

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Chaweng Beach Lamai Beach Bophut Choeng Mon Beach

Planning a trip to Koh Samui, Thailand this May? Here's what you need to know about the weather:

What to Expect in Koh Samui in May

Koh Samui, Thailand is a region in Thailand. May in Koh Samui generally has very warm temperatures, with precipitation levels ranging from high to heavy.

Temperatures

The average maximum temperatures are very warm and range from 31°C (88°F) in Chaweng Beach to 34°C (93°F) in Suratthani. Nighttime temperatures generally drop to 26°C (79°F) in Suratthani and 28°C (82°F) in Chaweng Beach. The temperatures mentioned for daytime and nighttime are general averages. However there can be days that surpass these temperatures. So equip yourself with clothing that can handle the potential heat.

For specific regional insights in Koh Samui, Thailand, refer to the map provided below.

Precipitation

In May, precipitation varies across different areas. From high rainfall in Laem Set Beach with an average of 119 mm (4.7 in) to heavy rainfall in Suratthani with 165 mm (6.5 in).

Average sunshine

Many locations offer abundant sunshine during this month. For instance, Chaweng Beach enjoys approximately 193 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 May

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 May for some of the most popular destinations in Koh Samui, Thailand?

Temperature range in Koh Samui (May)

Precipitation variation in Koh Samui (May)

Chaweng Beach

In May Chaweng Beach generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 28°C (82°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
31°C (88°F)
31°C (88°F)
Min temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Monthly sun hours
201 hours
193 hours
151 hours
Monthly rainfall
109 mm (4.3 in)
131 mm (5.2 in)
106 mm (4.2 in)
Monthly rainy days
8 days
17 days
16 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Chaweng Beach →

Lamai Beach

In May Lamai Beach generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 28°C (82°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
31°C (88°F)
31°C (88°F)
Min temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Monthly sun hours
201 hours
193 hours
151 hours
Monthly rainfall
109 mm (4.3 in)
124 mm (4.9 in)
99 mm (3.9 in)
Monthly rainy days
8 days
17 days
16 days
Weather conditions
tolerable
tolerable
pleasant
Climate in Lamai Beach →

Bophut

In May Bophut generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 28°C (82°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
31°C (88°F)
31°C (88°F)
Min temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Monthly sun hours
201 hours
193 hours
151 hours
Monthly rainfall
108 mm (4.3 in)
134 mm (5.3 in)
110 mm (4.3 in)
Monthly rainy days
8 days
17 days
16 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Bophut →

Choeng Mon Beach

In May Choeng Mon Beach generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 28°C (82°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
31°C (88°F)
31°C (88°F)
Min temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Monthly sun hours
201 hours
193 hours
151 hours
Monthly rainfall
109 mm (4.3 in)
137 mm (5.4 in)
113 mm (4.4 in)
Monthly rainy days
8 days
17 days
16 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Choeng Mon Beach →

Mae Nam Beach

In May Mae Nam Beach generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 28°C (82°F) and high monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
30°C (86°F)
31°C (88°F)
31°C (88°F)
Min temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Monthly sun hours
201 hours
193 hours
151 hours
Monthly rainfall
108 mm (4.3 in)
134 mm (5.3 in)
110 mm (4.3 in)
Monthly rainy days
8 days
17 days
16 days
Weather conditions
tolerable
tolerable
tolerable
Climate in Mae Nam Beach →

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

Popular cities in May

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

City Weather Day temp Night temp Rainfall
Chaweng Beach 31°C (88°F) 28°C (82°F) 131 mm (5.2 in)
Lamai Beach 31°C (88°F) 28°C (82°F) 124 mm (4.9 in)
Bophut 31°C (88°F) 28°C (82°F) 134 mm (5.3 in)
Choeng Mon Beach 31°C (88°F) 28°C (82°F) 137 mm (5.4 in)
Mae Nam Beach 31°C (88°F) 28°C (82°F) 134 mm (5.3 in)
Bangrak Beach 31°C (88°F) 28°C (82°F) 134 mm (5.3 in)

Koh Samui weather in May: frequently asked questions

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

Koh Samui, Thailand typically experiences unpleasant weather in May, part of the season. Daytime highs in Chaweng Beach average around 31°C (88°F), and temperatures drop to about 28°C (82°F) at night.

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

Average temperatures in Koh Samui, Thailand during May range from a nighttime low near 28°C (82°F) to a daytime high around 31°C (88°F) in Chaweng Beach.

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

Yes, May tends to be a wetter month in Koh Samui, Thailand. Average rainfall in Chaweng Beach sits around 131 mm (5.2 in).

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

In our opinion, May is a good time to visit Koh Samui, Thailand with overall tolerable weather in Chaweng Beach.

On average, the best time to visit Koh Samui, Thailand is in January and February with generally perfect weather in Chaweng Beach. On the other hand, the weather in October and November tend to be poor.

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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