The annual average maximum daily temperature is 4.6°C (40.3°F) which is too cold for sunbathing. The annual average water temperature is typically 20°C (68°F) which is comfortable for swimming though some may prefer warmer water. Annually there are on average 2.5 days of rain per month and 5.2 hours of sun per day.
The best months to visit Jeju Island are 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 June and November when the sea temperature is above the average 20°C (68°F) which is comfortable for swimming though some may prefer warmer water.
No, you can't sunbathe in Jeju Island all year round. Some months are too cold for sunbathing, however you might enjoy other beach activities such as taking a walk, going hiking along trails or just enjoying the scenery.
Even during the warmest month, sunbathing may not be ideal as temperatures don't reach 20°C (72°F). The warmest month in Jeju Island is August when the average maximum temperature is 8°C (46°F), average temperature is 7°C (44°F) and average minimum temperature is 6°C (43°F).
More info about the annual temperatures and sunshine.
No, you can't swim in Jeju Island all year round.
The warmest sea water temperatures in Jeju Island are found in August when they peak at 28°C (82°F) and lowest in March when they dip to 14°C (58°F).
The sea temperature is above average for swimming between June and November when the sea temperature is above 20°C (68°F) which is comfortable for swimming though some may prefer warmer water.
For perfect swimming and lounging all day, try the months from August to September when the sea temperature is above 26°C (79°F)
More info about the annual sea temperatures
The hottest month in Jeju Island is August when the average maximum temperature is too cold for sunbathing 8°C (46°F), average temperature is 7°C (44°F) and average minimum temperature is 6°C (43°F).
More info about the annual temperatures and sunshine.
The coolest month in Jeju Island is January when the average maximum temperature is 2°C (35°F), average temperature is 1°C (34°F) and average minimum temperature is 1°C (33°F).
More info about the annual temperatures and sunshine
The coldest sea water temperatures in Jeju Island are found in March when they dip to 14°C (58°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.
More info about the annual sea temperatures.
The warmest sea water temperatures in Jeju Island are found in August when they peak at 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 most humid month in Jeju Island is August with a dew point (an indicator of humidity) of 6°C (43°F) which is a bit dry for some.
More info about the annual humidity.
The least humid month in Jeju Island is January with a dew point of 0°C (33°F) which is a bit dry for some.
More info about the annual humidity.
The most windy month in Jeju Island is March when the average maximum windspeed is 7KM/H (4MPH) and the average wind speed is 4KM/H (2MPH).
More info about the annual wind conditions.
The hottest month in Jeju Island is August when the average maximum temperature is 8°C (46°F), average temperature is 7°C (44°F) and average minimum temperature is 6°C (43°F).
The coolest month in Jeju Island is January when the average maximum temperature is 2°C (2°F), average temperature is 1°C (34°F) and average minimum temperature is 1°C (33°F).
The longest days in Jeju Island are in June, with an average of 14.4 hours of daylight per day. December has the shortest days with an average of 10 hours of daylight per day.
The sunniest days in Jeju Island are in July which has the most hours of sunshine per day. The sunshine percentage is 50% making it quite sunny but with regular periods of cloudy and overcast skies. There are 6.2 hours of sunshine per day.
November has the least sunshine. The sunshine percentage is 36% making it very cloudy and overcast with some periods of sunshine. There are 4.3 hours of sunshine per day.
The ultraviolet index is the highest in July when it reaches 11.3 and lowest in December when it reaches 3.
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 warmest sea water temperatures in Jeju Island are found in August when they peak at 28°C (82°F) and lowest in March when they dip to 14°C (58°F).
The sea is best for swimming between June and November when the temperature is above 20°C (68°F) which is comfortable for swimming though some may prefer warmer water.
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.
