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28°
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30°
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The annual average maximum daily temperature is 31.5°C (88.6°F) which is very hot and perfect for sunbathing on clear days. The annual average water temperature is typically 29.1°C (84.4°F) which is very warm and ideal for relaxing and swimming for the whole day. Annually there are on average 15.1 days of rain per month and 6.1 hours of sun per day.
The best months to visit Ko Similan are January, February, March, December, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.
The sea is best for swimming between April and November when the sea temperature is above the average 29°C (84°F) which is very warm and ideal for relaxing and swimming for the whole day.
Yes, you can sunbathe in Ko Similan all year round.
The coolest month in Ko Similan is January when the average maximum temperature is 32°C (89°F), average temperature is 28°C (82°F) and average minimum temperature is 24°C (74°F).
More info about the annual temperatures and sunshine.
Yes, you can swim in Ko Similan all year round.
The warmest sea water temperatures in Ko Similan are found in April when they peak at 30°C (86°F) and lowest in January when they dip to 28°C (82°F).
The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures
The hottest month in Ko Similan is March when the average maximum temperature is very hot and perfect for sunbathing on clear days 33°C (91°F), average temperature is 28°C (83°F) and average minimum temperature is 24°C (76°F).
More info about the annual temperatures and sunshine.
The coolest month in Ko Similan is January when the average maximum temperature is 32°C (89°F), average temperature is 28°C (82°F) and average minimum temperature is 24°C (74°F).
More info about the annual temperatures and sunshine
The driest month in Ko Similan is February with 0.7cm (0.3inches) of rain and the least days of rain with 5.4 days with some rain, a quite rainy time to visit the beach.
More info about the annual rainfall
The coldest sea water temperatures in Ko Similan are found in January when they dip to 28°C (82°F) which is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures.
The warmest sea water temperatures in Ko Similan are found in April when they peak at 30°C (86°F) which is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures.
The most humid month in Ko Similan is May with a dew point (an indicator of humidity) of 26°C (78°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
More info about the annual humidity.
The least humid month in Ko Similan is January with a dew point of 24°C (74°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
More info about the annual humidity.
The most windy month in Ko Similan is June when the average maximum windspeed is 29KM/H (18MPH) and the average wind speed is 10KM/H (6MPH).
More info about the annual wind conditions.
The hottest month in Ko Similan is March when the average maximum temperature is 33°C (91°F), average temperature is 28°C (83°F) and average minimum temperature is 24°C (76°F).
The coolest month in Ko Similan is January when the average maximum temperature is 32°C (32°F), average temperature is 28°C (82°F) and average minimum temperature is 24°C (74°F).
The longest days in Ko Similan are in June, with an average of 12.6 hours of daylight per day. December has the shortest days with an average of 11.6 hours of daylight per day.
The sunniest days in Ko Similan are in February which has the most hours of sunshine per day. The sunshine percentage is 60% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.1 hours of sunshine per day.
November has the least sunshine. The sunshine percentage is 41% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.8 hours of sunshine per day.
The ultraviolet index is the highest in March when it reaches 15.1 and lowest in December when it reaches 10.9.
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 wettest month in Ko Similan is October with 91.6cm (36.1inches) of rain and the most days of rain with 21.5 days with some rain, a very wet time to visit the beach.
The driest month in Ko Similan is February with 0.7cm (0.3inches) of rain and the least days of rain with 5.4 days with some rain, a quite rainy time to visit the beach.
The most humid month in Ko Similan is May with a dew point (an indicator of humidity) of 26°C (78°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Ko Similan is January with a dew point of 24°C (74°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
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.
