Weather in Ko Samui, Thailand in May

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Visiting Ko Samui, Thailand in May

The weather in May is slightly warmer than the previous month. May has average maximum temperatures of 33°C (91°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 53.2% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day. It is a good time for sunbathing in Ko Samui.

May has total rainfall of 15.8cm (6.2inches) making it a bit rainy but with only moderate tropical showers. There are 18 days with some rainfall so you can still enjoy the beach on the clear days.

Sea temperatures are a very warm 30°C (86°F). May is an excellent month for swimming in Ko Samui with very comfortable temperatures for bathing all day. The sea temperature in May is marginally warmer than the previous month and temperatures continue to rise slightly into June.

Consider visiting Ko Samui in the months of January, February, March, April, for the best beach weather. Also consider one of our other suggestions for May.

Can you sunbathe in Ko Samui in May?

Yes, May is a good time for sunbathing in Ko Samui.

May has average maximum temperatures of 33°C (91°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 53.2% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day. May has total rainfall of 15.8cm (6.2inches) making it a bit rainy but with only moderate tropical showers. There are 18 days with some rainfall so you can still enjoy the beach on the clear days.

More about May temperature and sunshine.

Can you swim in Ko Samui in May?

Yes, May is an excellent month for swimming in Ko Samui with very warm sea temperatures 30°C (86°F).

More about May sea temperatures.

Is May a good time to holiday in Ko Samui?

Yes, May is a good time for a holiday in Ko Samui.

May has average maximum temperatures of 33°C (91°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 53.2% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day. May has total rainfall of 15.8cm (6.2inches) making it a bit rainy but with only moderate tropical showers. There are 18 days with some rainfall so you can still enjoy the beach on the clear days. It is a good time for sunbathing in Ko Samui. Sea temperatures are a very warm 30°C (86°F). May is an excellent month for swimming in Ko Samui with very comfortable temperatures for bathing all day.

More about the May temperatures and sunshine.

Is Ko Samui warm in May?

Yes, Ko Samui is very hot and perfect for sunbathing on clear days in May.

The average maximum temperature in Ko Samui in May is 33°C (91°F). The average maximum temperature is 33°C (91°) in the previous month and 33°C (91°F) in the next month.

The average temperature in Ko Samui in May is 30°C (86°F). The average temperature is 30°C (85°F) in the previous month and 30°C (86°F) in the next month.

More info about the May temperatures and sunshine.

How sunny is Ko Samui in May?

The average day light hours per day in Ko Samui in May are 12.6. The sunshine percentage is 53.2% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day.

More about May sunshine.

Temperature in Ko Samui in May

The weather in May is slightly warmer than the previous month. The average maximum temperature in Ko Samui in May is 33°C (91°F). The average maximum temperature is 33°C (91°F) in the previous month and 33°C (91°F) in the next month.

The average temperature in Ko Samui in May is 30°C (86°F). The average temperature is 30°C (85°F) in the previous month and 30°C (86°F) in the next month.

The average minimum temperature in Ko Samui in May is 27°C (81°F). The minimum temperature is 27°C (81°F) in the previous month and 27°C (81°F) in the next month.

Sunshine in Ko Samui in May

The days in May are marginally longer than the previous month and the days continue to get marginally longer into June. May has marginally more hours of sunshine than the previous month and hours of sunshine continue to rise slightly into June. During May the average day light hours are 12.6 per day in Ko Samui. The sunshine percentage is 53.2% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day.

The ultraviolet index in Ko Samui in May is typically 13.7 during May. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Ko Samui in May

The average sea water temperature in Ko Samui in May is 30°C (86°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in May is marginally warmer than the previous month and temperatures continue to rise slightly into June.

Rainfall in Ko Samui in May

May weather is wetter than the previous month. May has more days of rain than the previous month. The average total rainfall in Ko Samui in May is 15.8cm (6.2inches) and on average there are 18 rainy days in May making it a wet time to visit the beach.

Humidity in Ko Samui in May

The maximum dew point (an indicator of humidity) in Ko Samui in May is 26°C (79°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 26°C (79°F) in the previous month and 26°C (26°F) in the next month.

The average maximum relative humidity in Ko Samui in May is typically 87.4%. The maximum relative humidity is 88.5% in the previous month and 85% in the next month.

The average relative humidity in Ko Samui in May is typically 73.1%. The average relative humidity is 73.6% in the previous month and 71.1% in the next month.

Wind Speed in Ko Samui in May

The average maximum wind speed in Ko Samui in May is typically 22KM/H (14MPH). The average maximum wind speed is 22KM/H (13MPH) in the previous month and 24KM/H (15MPH) in the next month.

The average wind speed in Ko Samui in May is typically 10KM/H (6MPH). The average wind speed is 11KM/H (7MPH) in the previous month and 11KM/H (7MPH) in the next month.

The average wind direction in Ko Samui in May is from the West.

Monthly Averages

Suggested Beaches in May

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.