UV Index in Gili Trawangan, Indonesia

Last updated: September 1, 2025

Understanding the UV Index is crucial for enjoying the sun safely in Gili Trawangan, Indonesia. This beautiful island, characterized by a tropical climate and stunning beaches, can expose you to harmful ultraviolet radiation, particularly during peak hours. Monitoring UV levels is essential not only for preventing sunburn but also for protecting long-term skin health. With UV Index readings soaring as high as 11 during midday, it's vital to be aware of the risks and take necessary precautions to enjoy the sun without compromising your well-being.

Hourly UV Index in Gili Trawangan

The UV Index throughout the day showcases a dramatic rise as the sun reaches its peak. Starting at a modest 1 at 7:00 AM, it climbs steadily, hitting 4 by 9:00 AM, and then surging to 11 by noon—the highest level of the day. This intense peak at 12:00 PM signals a critical time for sun safety, with values remaining elevated at 10 until 1:00 PM. As the afternoon progresses, the index gradually declines to 5 by 3:00 PM, and then drops further, reaching a low of 0 by 7:00 PM. It's clear that during the midday hours, especially between 10 AM and 2 PM, extra precautions are essential to protect against harmful UV exposure.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	10	very high	15 min
11:00	13	extreme	10 min
12:00	15	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Gili Trawangan

The UV Index exhibits significant seasonal changes, with the highest levels occurring from January to April, where it reaches an extreme rating of 15-16 and a rapid burn time of just 10 minutes. July and August also present high-risk conditions with indices of 11 and 13 respectively. Recognizing these trends, January through April and July through September are particularly high-risk months for UV exposure. Residents and visitors should take extra precautions during these periods, such as seeking shade, wearing protective clothing, and applying sunscreen frequently, to minimize the risk of skin damage.

Monthly Maximum UV Index for Gili Trawangan, Indonesia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Gili Trawangan. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Gili Trawangan, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Gili Trawangan UV Index with Other Indonesia Cities

The table above highlights how UV exposure in Gili Trawangan compares to other major locations across Indonesia. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Gili Trawangan's solar exposure compared to other cities in Indonesia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Surabaya UVI	13	15	14	12	12	10	11	12	14	13	13	13
Bekasi UVI	14	16	16	14	11	10	10	11	13	15	14	13
Jakarta UVI	14	16	16	14	11	10	10	11	13	15	14	13
Medan UVI	13	15	15	15	14	12	12	13	14	14	13	12
Bandung UVI	15	16	16	15	12	11	11	12	14	15	15	14
Gili Trawangan	15	16	15	15	13	10	11	13	15	15	14	14