The hottest month in Gili Trawangan is November when the average maximum temperature is 31°, average temperature is 28° and average minimum temperature is 25°.
The coolest month in Gili Trawangan is September when the average maximum temperature is 29°, average temperature is 27° and average minimum temperature is 24°.
The longest days in Gili Trawangan are in January, with an average of 12.6 hours of daylight per day. June has the shortest days with an average of 11.6 hours of daylight per day.
The sunniest days in Gili Trawangan are in October which has the most hours of sunshine per day with an average of 9.1 hours of sunshine per day, making it a sunny month with few clouds. September has the least sunshine with an average of 3.7 hours of sunshine per day, making it not a particularly sunny month.
The ultraviolet index is the highest in February when it reaches 15.9 and lowest in June when it reaches 10.
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 Gili Trawangan are found in November when they peak at 30° and lowest in July when they dip to 27°.
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.
The most humid month in Gili Trawangan is April with a dew point (an indicator of humidity) of 26° 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 Gili Trawangan is August with a dew point of 23° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
The most windy month in Gili Trawangan is January when the average maximum windspeed is 28kmh and the average wind speed is 14kmh.
The least windy month in Gili Trawangan is November when the average maximum windspeed is 21kmh and the average wind speed is 8kmh.