UV Index in Surabaya, Indonesia

Last updated: July 2, 2025

Understanding the UV Index in Surabaya, Indonesia is crucial for protecting your skin and overall health. With its tropical climate and persistent sun exposure, residents and visitors alike need to be aware of the potential risks for sunburn and long-term skin damage. The UV levels in Surabaya can peak dramatically, reaching an intense 12 around midday, making awareness and prevention essential to safeguard your skin. By learning how to monitor these UV levels, you can enjoy the vibrant outdoors while minimizing the risks associated with high UV exposure.

Hourly UV Index in Surabaya

The UV Index data unveils a dynamic day under the sun. Beginning at a gentle 1 at 07:00, the intensity gradually ascends, reaching a moderate 2 by 08:00. As the morning unfolds, the UV levels surge to a notable 5 at 09:00, escalating to a peak of 12 by 12:00—the highest point of the day. Even in the early afternoon, the index remains significant, hitting 10 at 13:00, before gently tapering off to 8 at 14:00. The UV strength declines steadily, dropping to 5 by 15:00, and receding further to 1 as evening approaches at 17:00. By nightfall, UV exposure becomes negligible, settling at 0 by 18:00 and beyond. This data serves as a reminder to protect your skin during the day's peak exposure times!

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	2	low	45 min
09:00	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	10	very high	15 min
14:00	8	very high	15 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Surabaya

Throughout the year, the UV Index consistently stays in the extreme category, with values ranging from 11 to 16. The highest readings occur between March and April, making these months particularly critical for sun safety. Notably, January to May and October to November show UV levels that remain at 15, signaling a high-risk period for skin damage with a burn time of only 10 minutes. Residents and visitors are strongly advised to take precautions during these high-risk months by wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade whenever possible to minimize UV exposure and protect against harmful effects.

Monthly Maximum UV Index for Surabaya, Indonesia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Surabaya. 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 Surabaya, 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 Surabaya UV Index with Other Indonesia Cities

The table above highlights how UV exposure in Surabaya 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.

Surabaya'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
Surabaya	15	15	16	15	13	11	12	13	14	15	15	14