Gili Trawangan weather in September
In September, Gili Trawangan sees average daytime highs of 27°C and overnight lows near 25°C, with 13 mm of rain across 3.1 wet days and about 12 hours of daylight. It is the 8th-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 59% of the time in September, and the air most often feels oppressive.
Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Gili Trawangan's 2nd-clearest and 1st-windiest month. For the whole year in context, see Gili Trawangan's year-round climate.
- Daytime high
- 27°
- 8th warmest
- Overnight low
- 25°
- 3rd coldest
- Rainfall
- 13 mm
- 3.1 wet days
- Daylight
- 12 hours
- 6:12 AM – 6:09 PM
- Cloud cover
- 37%
- 2nd clearest
- Wind
- 17 km/h
- 1st windiest
- Solar energy
- 6.84 kWh/m²
- Travel score
- 7.8
- out of 10
Gili Trawangan is town.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 27°C through the month.
A typical September day in Gili Trawangan reaches about 27°C in the afternoon and slips back to 25°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 25 |
| 2 | 27 | 25 |
| 3 | 27 | 25 |
| 4 | 27 | 25 |
| 5 | 27 | 25 |
| 6 | 27 | 25 |
| 7 | 27 | 25 |
| 8 | 27 | 25 |
| 9 | 27 | 25 |
| 10 | 27 | 25 |
| 11 | 27 | 25 |
| 12 | 27 | 25 |
| 13 | 27 | 25 |
| 14 | 27 | 25 |
| 15 | 27 | 25 |
| 16 | 27 | 25 |
| 17 | 27 | 25 |
| 18 | 27 | 26 |
| 19 | 27 | 26 |
| 20 | 27 | 26 |
| 21 | 27 | 26 |
| 22 | 27 | 26 |
| 23 | 27 | 26 |
| 24 | 27 | 26 |
| 25 | 27 | 26 |
| 26 | 27 | 26 |
| 27 | 27 | 26 |
| 28 | 27 | 26 |
| 29 | 27 | 26 |
| 30 | 28 | 26 |
How September really feels in Gili Trawangan
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Gili Trawangan weather by month
How September compares with the rest of the year at a glance. September is the 8th-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 26° | 257 | 26.3 | 12.4 | 3.8 |
| Feb | 27° / 26° | 232 | 25.1 | 12.3 | 3.7 |
| Mar | 28° / 26° | 195 | 24.7 | 12.1 | 4.2 |
| Apr | 28° / 27° | 113 | 19.8 | 11.8 | 4.7 |
| May | 28° / 27° | 44 | 11.4 | 11.6 | 6.0 |
| Jun | 28° / 26° | 31 | 7.5 | 11.5 | 7.0 |
| Jul | 27° / 25° | 22 | 5.5 | 11.6 | 7.5 |
| Aug | 27° / 25° | 10 | 3.5 | 11.7 | 7.9 |
| Sep | 27° / 25° | 13 | 3.1 | 12 | 7.8 |
| Oct | 28° / 26° | 33 | 8.2 | 12.2 | 6.8 |
| Nov | 28° / 27° | 105 | 18.1 | 12.4 | 4.9 |
| Dec | 28° / 26° | 232 | 25.4 | 12.5 | 4.0 |
Cloud cover in September
The sky is clear or mostly clear about 59% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 80 | 80 | 80 | 80 | 80 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 78 | 77 | 76 | 76 | 76 | 74 | 74 | 74 | 74 | 73 | 72 | 72 | 71 | 71 | 70 | 70 |
| Cloudier (%) | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 24 | 24 | 24 | 26 | 26 | 26 | 26 | 27 | 28 | 28 | 29 | 29 | 30 | 30 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 80 | 20 |
| 2 | 80 | 20 |
| 3 | 80 | 20 |
| 4 | 80 | 20 |
| 5 | 80 | 20 |
| 6 | 79 | 21 |
| 7 | 79 | 21 |
| 8 | 79 | 21 |
| 9 | 79 | 21 |
| 10 | 79 | 21 |
| 11 | 78 | 22 |
| 12 | 78 | 22 |
| 13 | 78 | 22 |
| 14 | 78 | 22 |
| 15 | 78 | 22 |
| 16 | 77 | 23 |
| 17 | 76 | 24 |
| 18 | 76 | 24 |
| 19 | 76 | 24 |
| 20 | 74 | 26 |
| 21 | 74 | 26 |
| 22 | 74 | 26 |
| 23 | 74 | 26 |
| 24 | 73 | 27 |
| 25 | 72 | 28 |
| 26 | 72 | 28 |
| 27 | 71 | 29 |
| 28 | 71 | 29 |
| 29 | 70 | 30 |
| 30 | 70 | 30 |
Chance of precipitation in September
Gili Trawangan gets around 13 mm of rain over 3.1 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 11% and peaks near 14% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Rain chance (%) | |
|---|---|
| 1 | 7 |
| 2 | 7 |
| 3 | 7 |
| 4 | 7 |
| 5 | 7 |
| 6 | 8 |
| 7 | 8 |
| 8 | 8 |
| 9 | 9 |
| 10 | 9 |
| 11 | 10 |
| 12 | 10 |
| 13 | 11 |
| 14 | 12 |
| 15 | 12 |
| 16 | 13 |
| 17 | 13 |
| 18 | 13 |
| 19 | 14 |
| 20 | 14 |
| 21 | 14 |
| 22 | 14 |
| 23 | 14 |
| 24 | 14 |
| 25 | 14 |
| 26 | 14 |
| 27 | 14 |
| 28 | 14 |
| 29 | 14 |
| 30 | 14 |
Humidity in September
Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the oppressive band about 87% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 19 | 19 | 18 | 17 | 16 | 16 | 15 | 14 | 13 | 13 | 12 | 11 | 11 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 |
| Oppressive (%) | 80 | 80 | 81 | 82 | 83 | 83 | 85 | 86 | 87 | 86 | 87 | 88 | 88 | 89 | 90 | 89 | 90 | 90 | 91 | 90 | 91 | 90 | 90 | 91 | 90 | 89 | 89 | 88 | 89 | 88 |
| Miserable (%) | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 6 | 6 | 7 | 7 | 8 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 19 | 80 | 1 |
| 2 | 19 | 80 | 1 |
| 3 | 18 | 81 | 1 |
| 4 | 17 | 82 | 1 |
| 5 | 16 | 83 | 1 |
| 6 | 16 | 83 | 1 |
| 7 | 15 | 85 | 0 |
| 8 | 14 | 86 | 0 |
| 9 | 13 | 87 | 0 |
| 10 | 13 | 86 | 1 |
| 11 | 12 | 87 | 1 |
| 12 | 11 | 88 | 1 |
| 13 | 11 | 88 | 1 |
| 14 | 10 | 89 | 1 |
| 15 | 9 | 90 | 1 |
| 16 | 9 | 89 | 2 |
| 17 | 8 | 90 | 2 |
| 18 | 8 | 90 | 2 |
| 19 | 7 | 91 | 2 |
| 20 | 7 | 90 | 3 |
| 21 | 6 | 91 | 3 |
| 22 | 6 | 90 | 4 |
| 23 | 6 | 90 | 4 |
| 24 | 5 | 91 | 4 |
| 25 | 5 | 90 | 5 |
| 26 | 5 | 89 | 6 |
| 27 | 5 | 89 | 6 |
| 28 | 5 | 88 | 7 |
| 29 | 4 | 89 | 7 |
| 30 | 4 | 88 | 8 |
Wind in September
Winds average 17 km/h in September, the windiest month of the year.
Across September, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 15 | light breeze |
| 2 | 15 | light breeze |
| 3 | 16 | light breeze |
| 4 | 16 | light breeze |
| 5 | 16 | light breeze |
| 6 | 16 | light breeze |
| 7 | 16 | light breeze |
| 8 | 16 | light breeze |
| 9 | 16 | light breeze |
| 10 | 16 | light breeze |
| 11 | 16 | light breeze |
| 12 | 16 | light breeze |
| 13 | 16 | light breeze |
| 14 | 16 | light breeze |
| 15 | 16 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 17 | light breeze |
| 27 | 18 | light breeze |
| 28 | 18 | light breeze |
| 29 | 18 | light breeze |
| 30 | 18 | light breeze |
Sunrise & sunset in September
Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over September. Sunrise moves from 6:20 AM to 6:03 AM, and sunset from 6:11 PM to 6:07 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 |
| Sunrise (AM) | 6:20 | 6:20 | 6:19 | 6:19 | 6:18 | 6:18 | 6:17 | 6:16 | 6:16 | 6:15 | 6:15 | 6:14 | 6:13 | 6:13 | 6:12 | 6:12 | 6:11 | 6:10 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:07 | 6:06 | 6:06 | 6:05 | 6:04 | 6:04 | 6:03 |
| Sunset (PM) | 6:11 | 6:11 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:09 | 6:09 | 6:09 | 6:09 | 6:09 | 6:09 | 6:09 | 6:09 | 6:08 | 6:08 | 6:08 | 6:08 | 6:08 | 6:08 | 6:08 | 6:08 | 6:07 | 6:07 | 6:07 | 6:07 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.8 | 6:20 | 6:11 |
| 2 | 11.8 | 6:20 | 6:11 |
| 3 | 11.9 | 6:19 | 6:10 |
| 4 | 11.9 | 6:19 | 6:10 |
| 5 | 11.9 | 6:18 | 6:10 |
| 6 | 11.9 | 6:18 | 6:10 |
| 7 | 11.9 | 6:17 | 6:10 |
| 8 | 11.9 | 6:16 | 6:10 |
| 9 | 11.9 | 6:16 | 6:10 |
| 10 | 11.9 | 6:15 | 6:10 |
| 11 | 11.9 | 6:15 | 6:09 |
| 12 | 11.9 | 6:14 | 6:09 |
| 13 | 11.9 | 6:13 | 6:09 |
| 14 | 11.9 | 6:13 | 6:09 |
| 15 | 11.9 | 6:12 | 6:09 |
| 16 | 12.0 | 6:12 | 6:09 |
| 17 | 12.0 | 6:11 | 6:09 |
| 18 | 12.0 | 6:10 | 6:09 |
| 19 | 12.0 | 6:10 | 6:08 |
| 20 | 12.0 | 6:09 | 6:08 |
| 21 | 12.0 | 6:08 | 6:08 |
| 22 | 12.0 | 6:08 | 6:08 |
| 23 | 12.0 | 6:07 | 6:08 |
| 24 | 12.0 | 6:07 | 6:08 |
| 25 | 12.0 | 6:06 | 6:08 |
| 26 | 12.0 | 6:06 | 6:08 |
| 27 | 12.0 | 6:05 | 6:07 |
| 28 | 12.0 | 6:04 | 6:07 |
| 29 | 12.1 | 6:04 | 6:07 |
| 30 | 12.1 | 6:03 | 6:07 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6.84 kWh/m².
For context, solar energy here swings from a low near 5.32 kWh/m² to a high of 7.03 kWh/m² in October across the year — September's 6.84 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.6 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.7 | Intense |
| 6 | 6.7 | Intense |
| 7 | 6.7 | Intense |
| 8 | 6.7 | Intense |
| 9 | 6.7 | Intense |
| 10 | 6.8 | Intense |
| 11 | 6.8 | Intense |
| 12 | 6.8 | Intense |
| 13 | 6.8 | Intense |
| 14 | 6.8 | Intense |
| 15 | 6.8 | Intense |
| 16 | 6.8 | Intense |
| 17 | 6.9 | Intense |
| 18 | 6.9 | Intense |
| 19 | 6.9 | Intense |
| 20 | 6.9 | Intense |
| 21 | 6.9 | Intense |
| 22 | 6.9 | Intense |
| 23 | 6.9 | Intense |
| 24 | 7.0 | Intense |
| 25 | 7.0 | Intense |
| 26 | 7.0 | Intense |
| 27 | 7.0 | Intense |
| 28 | 7.0 | Intense |
| 29 | 7.0 | Intense |
| 30 | 7.0 | Intense |
Hazard calendar for Gili Trawangan
None of Gili Trawangan's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Gili Trawangan sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Gili Trawangan's monsoon runs December–March, when most of the year's rain falls.
Is September a good time to visit Gili Trawangan?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Gili Trawangan for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Gili Trawangan in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Gili Trawangan sees daytime highs around 27°C and nights near 25°C. Pack light clothes and sun protection. About 3 days see rain.
Sea temperature near Gili Trawangan in September
The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in April at about 29°C and coldest in August near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 28 | Warm |
| Aug | 28 | Warm |
| Sep | 28 | Warm |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Gili Trawangan in September
Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Gili Trawangan peaks around March 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 14 | 14 | 13 | 10 | 9 | 10 | 12 | 13 | 12 | 11 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
Air quality in Gili Trawangan in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Gili Trawangan is worst in October — around 22 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (April, 13 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 14 | 14 | 13 | 14 | 14 | 13 | 14 | 18 | 22 | 21 | 15 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 14 | Moderate |
| Mar | 14 | Moderate |
| Apr | 13 | Moderate |
| May | 14 | Moderate |
| Jun | 14 | Moderate |
| Jul | 13 | Moderate |
| Aug | 14 | Moderate |
| Sep | 18 | Moderate |
| Oct | 22 | Moderate |
| Nov | 21 | Moderate |
| Dec | 15 | Moderate |
Where is Gili Trawangan?
Gili Trawangan sits at 8.3°S, 116.0°E, 0 m above sea level, in Indonesia. The nearest listed city is Lombok, 27 km away.
Topography around Gili Trawangan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Gili Trawangan.
Within 3 km, the terrain around Gili Trawangan has only modest variations in elevation — a maximum elevation change of 75 m around an average of 1 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 853 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,635 m.
The land around Gili Trawangan is covered by water (84%) within 3 km, water (81%) within 16 km, and water (63%) and trees (27%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Gili Trawangan (-8.349°, 116.037°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).