Gili Trawangan has a tropical monsoon climate with warm temperatures year-round and minimal seasonal variation. Daytime highs range from 29°C to 32°C, while nights are comfortably mild. The wet season runs from November to March, bringing heavy showers, while the dry season from April to October offers plenty of sunshine and ideal beach conditions.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Gili Trawangan’s climate is defined by two main seasons: a wet season from November to March and a dry season from April to October. Temperatures are remarkably stable, with average daytime highs between 29°C and 32°C and nighttime lows of 21–24°C throughout the year. The wet season sees frequent, sometimes intense, showers – January is the rainiest month, averaging 284 mm of rain over 21 days. December and February are also wet, with high humidity (up to 82%), but rain usually falls in short bursts, leaving sunny intervals. The sea remains warm, typically 27–29°C, making swimming and diving possible year-round.
The dry season, from April to October, is the most popular time for visitors. Rainfall drops sharply, with July and August seeing just 14–17 mm over 2–3 rainy days per month. Sunshine is abundant, with 8–9 hours per day, and humidity is lower, making conditions more comfortable. The sea is calm and clear, ideal for snorkelling and diving, and daytime highs hover around 30–31°C. Winds are generally mild, with the calmest conditions in March. The island enjoys over 1,580 mm of annual rainfall, but the wettest months are balanced by lush vegetation and fewer tourists. Gili Trawangan’s climate ensures warm, beach-friendly weather almost every month, with only minor variations in temperature and rainfall.
| Average climate data for Gili Trawangan, Indonesia | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 28 | 28 | 28 | 29 | 29 | 28 | 27 | 27 | 27 | 29 | 29 | 28 | 29 |
| Average minimum temperature (°C) | 26 | 26 | 26 | 26 | 26 | 25 | 24 | 24 | 24 | 26 | 26 | 26 | 24 |
| Average precipitation (mm) | 168 | 136 | 179 | 141 | 77 | 37 | 27 | 15 | 27 | 50 | 148 | 205 | 1,209 |
| Average rainfall days (days) | 28 | 24 | 26 | 26 | 22 | 15 | 15 | 12 | 12 | 18 | 24 | 27 | 251 |
| Average relative humidity (%) | 80 | 79 | 78 | 79 | 80 | 78 | 78 | 78 | 77 | 76 | 78 | 80 | 78 |
| Average wind speed (km/h) | 12 | 10 | 9 | 8 | 10 | 12 | 13 | 13 | 13 | 12 | 10 | 10 | 11 |
| Average water temperature (°C) | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 | 28 |
| Average daily daylight hours (h) | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 |
| Average daily sunshine hours (h) | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 11 | 11 | 9 | 9 |
| Average cloud coverage (%) | 44 | 41 | 39 | 35 | 29 | 24 | 25 | 21 | 22 | 22 | 33 | 43 | 32 |
| Average UV index | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
The best time to visit Gili Trawangan is from May to September, during the dry season. These months offer abundant sunshine, minimal rain, and calm, clear seas – ideal for beach activities, diving, and snorkelling. July and August are especially popular, with lively island life and perfect weather, but early or late dry season months offer fewer crowds and great conditions.
The least favourable time to visit is from December to February, when the wet season peaks. Heavy, frequent showers and high humidity can disrupt outdoor plans, and seas may be rougher. However, mornings are often sunny, and the island is lush and quieter, with lower prices and fewer tourists.
Gili Trawangan has a tropical monsoon climate with warm temperatures (29–32°C) and mild nights all year. The wet season (November–March) brings heavy showers, while the dry season (April–October) is sunny and ideal for beaches.
The rainy season runs from November to March, with the heaviest rainfall in December, January, and February. Rain usually falls in short, intense bursts, leaving plenty of sunny intervals for outdoor activities.
Sea temperatures remain between 27°C and 29°C year-round, making swimming, snorkelling, and diving comfortable in any month. The water is clearest and calmest during the dry season.
Yes, humidity is high year-round, peaking at 82% during the wet season. The dry season is less humid and more comfortable, especially for outdoor and beach activities.
Pack light, breathable clothing, swimwear, sun protection, and a hat. In the wet season, bring a rain jacket and waterproof shoes. Hydration and sunblock are essential year-round.
Winds are generally mild, with the calmest conditions in March. Occasionally, stronger breezes occur, but wind rarely disrupts beach or water activities.
The island is least crowded during the wet season (November–March), especially in December and January. This period offers quieter beaches and lower prices, though rain is more frequent.
The warmest month, with the highest average maximum temperature, is November (28.9 °C). The month with the lowest average maximum temperature is July (27 °C). Overall, the average maximum temperature over the whole year is 28.1 °C.
The month with the highest average minimum temperature is December (26.4 °C). The coldest month, with the lowest average minimum temperature, is August (23.6 °C). Overall, the average minimum temperature over the whole year is 25.3 °C.
The month with the highest average water temperature is November (29.1 °C). The month with the lowest average water temperature is August (26.9 °C). Overall, the average water temperature over the whole year is 28.3 °C.
The wettest month, with the highest amount of precipitation, is December (205.3 mm). The driest month, with the least amount of precipitation, is August (14.9 mm). Over the whole year there are 1,209.2 mm of rainfall on average.
The month with the most days of rain is January (28.1 days). The month with the fewest days of rain is August (12.2 days). Over the whole year there are 251.1 days of rain on average.
The month with the highest average relative humidity is January (79.7 %). The month with the lowest average relative humidity is October (75.9 %). The overall average relative humidity over the whole year is 78.3 %.
The windiest month, with the highest average wind speed, is July (13.5 km/h). The calmest month, with the lowest average wind speed, is April (7.7 km/h). The overall average wind speed over the whole year is 10.9 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is January (43.8 %). The month with the clearest skies, so the lowest cloud coverage, is August (20.9 %). Over the whole year there is an average cloud coverage of 31.6 %.
The month with the longest days, so the most daylight, is December (Average daylight: 12.1 h). The months with the shortest days, so the least daylight, are May, June and July (Average daylight: 11.1 h). Over the whole year there are 11.6 h of daylight per day on average.
The month with the most sunshine per day is November (Average sunshine: 11.1 h). The month with the least sunshine per day is January (Average sunshine: 7.1 h). Over the whole year there are 9 h of sunlight per day on average.
Over the whole year the average UV index is 7.
