UV Index in Surabaya, Indonesia

Last updated: June 2, 2025

Understanding the UV Index is essential for the residents of Surabaya, Indonesia, where the tropical climate can lead to heightened exposure to harmful ultraviolet rays. As you navigate life in this vibrant city, being aware of UV levels helps protect your skin from sunburn and long-term damage. With Surabaya's typically high UV exposure, especially during midday hours when the index peaks at a staggering 11, prioritizing sun safety becomes crucial. Staying informed not only fosters better skin health but also encourages enjoyable outdoor activities without the fear of overexposure. Be sun-smart and let this guide you in making informed choices about your sun protection!

Hourly UV Index in Surabaya

The UV Index rises sharply throughout the morning, starting from a modest 1 at 07:00 and making a steady climb to reach its peak of 11 at both 11:00 and 12:00. During this prime time, sun protection is essential to safeguard against harmful rays. As the afternoon progresses, the index begins to decline, dropping to 10 at 13:00 and then tapering off to 4 by 15:00. By late afternoon, the UV Index diminishes significantly, falling to 1 by 17:00 and ultimately reaching 0 at 18:00 and 19:00. This trend emphasizes the importance of planning outdoor activities for early morning or late afternoon to enjoy the sun safely!

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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 min
15:00	4	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