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The weather in September is marginally cooler than the previous month and temperatures continue to drop slightly into October. September has average maximum temperatures of 32°C (89°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 47.5% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day. It is not an optimal time for sunbathing but it is possible on clearer days in Ko Samui.
September has total rainfall of 18.8cm (7.4inches) making it quite rainy but with only moderate tropical showers. There are 21 days with some rainfall so there are few clear days to enjoy the beach.
Sea temperatures are a very warm 29°C (84°F). September is an excellent month for swimming in Ko Samui with very comfortable temperatures for bathing all day. The sea temperature in September is slightly cooler than the previous month.
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 September.
Yes, September is not an optimal time for sunbathing but it is possible on clearer days in Ko Samui.
September has average maximum temperatures of 32°C (89°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 47.5% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day. September has total rainfall of 18.8cm (7.4inches) making it quite rainy but with only moderate tropical showers. There are 21 days with some rainfall so there are few clear days to enjoy the beach.
More about September temperature and sunshine.
Yes, September is an excellent month for swimming in Ko Samui with very warm sea temperatures 29°C (84°F).
More about September sea temperatures.
Yes, September is a good time for a holiday in Ko Samui.
September has average maximum temperatures of 32°C (89°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 47.5% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day. September has total rainfall of 18.8cm (7.4inches) making it quite rainy but with only moderate tropical showers. There are 21 days with some rainfall so there are few clear days to enjoy the beach. It is not an optimal time for sunbathing but it is possible on clearer days in Ko Samui. Sea temperatures are a very warm 29°C (84°F). September is an excellent month for swimming in Ko Samui with very comfortable temperatures for bathing all day.
More about the September temperatures and sunshine.
Yes, Ko Samui is very hot and perfect for sunbathing on clear days in September.
The average maximum temperature in Ko Samui in September is 32°C (89°F). The average maximum temperature is 32°C (90°) in the previous month and 31°C (88°F) in the next month.
The average temperature in Ko Samui in September is 29°C (84°F). The average temperature is 29°C (85°F) in the previous month and 28°C (83°F) in the next month.
More info about the September temperatures and sunshine.
The average day light hours per day in Ko Samui in September are 12.2. The sunshine percentage is 47.5% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day.
More about September sunshine.
The weather in September is marginally cooler than the previous month and temperatures continue to drop slightly into October. The average maximum temperature in Ko Samui in September is 32°C (89°F). The average maximum temperature is 32°C (90°F) in the previous month and 31°C (88°F) in the next month.
The average temperature in Ko Samui in September is 29°C (84°F). The average temperature is 29°C (85°F) in the previous month and 28°C (83°F) in the next month.
The average minimum temperature in Ko Samui in September is 27°C (80°F). The minimum temperature is 27°C (80°F) in the previous month and 26°C (79°F) in the next month.
The days in September are marginally shorter than the previous month and days continue to get marginally shorter into October. September has fewer hours of sunshine than the previous month and hours of sunshine continue to drop slightly into October. During September the average day light hours are 12.2 per day in Ko Samui. The sunshine percentage is 47.5% making it quite sunny but with regular periods of cloudy and overcast skies. There are 5.8 hours of sunshine per day.
The ultraviolet index in Ko Samui in September is typically 13.9 during September. 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.
The average sea water temperature in Ko Samui in September is 29.1°C (84.4°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in September is slightly cooler than the previous month.
September weather is much wetter than the previous month and rainfall continues to rise quickly into October. September has a few more days of rain than the previous month and rainy days continue to rise slightly into October. The average total rainfall in Ko Samui in September is 18.8cm (7.4inches) and on average there are 21 rainy days in September making it a very wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Ko Samui in September is 25°C (77°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 25°C (77°F) in the previous month and 25°C (25°F) in the next month.
The average maximum relative humidity in Ko Samui in September is typically 86.4%. The maximum relative humidity is 85.2% in the previous month and 90.4% in the next month.
The average relative humidity in Ko Samui in September is typically 73.3%. The average relative humidity is 71.5% in the previous month and 78.1% in the next month.
The average maximum wind speed in Ko Samui in September is typically 24KM/H (15MPH). The average maximum wind speed is 24KM/H (15MPH) in the previous month and 22KM/H (14MPH) in the next month.
The average wind speed in Ko Samui in September is typically 12KM/H (8MPH). The average wind speed is 12KM/H (8MPH) in the previous month and 10KM/H (6MPH) in the next month.
The average wind direction in Ko Samui in September is from the West-Northwest.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
