UV Index in Surabaya, Indonesia

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Surabaya, Indonesia, where the tropical climate brings intense sunshine and potential risks of harmful ultraviolet radiation. With UV levels frequently reaching values as high as 11 around midday, awareness of these levels becomes essential for preventing sunburn and safeguarding skin health. As the sun is at its peak, typically between 10 AM and 2 PM, the likelihood of overexposure increases significantly, making it vital to monitor the UV Index regularly and take appropriate protective measures. Stay informed and enjoy the vibrant outdoors of Surabaya while prioritizing your skin's safety!

Hourly UV Index in Surabaya

As the day unfolds, the UV Index demonstrates a striking rise in intensity. At 07:00, it starts at a modest 1, but quickly escalates, reaching 3 by 08:00. The peak arrives at 12:00, where the index soars to a blazing 11, signaling the need for sun protection. As the afternoon progresses, it begins to decline, dropping to 9 at 13:00 and then tapering off to 6 by 14:00. Gradually, the UV levels fall further to 3 at 15:00, before easing to a safe 1 by 17:00. By the evening, the UV Index diminishes entirely, hitting 0 by 18:00 and remaining at that level through to 19:00. This ebb and flow of UV exposure underscores the importance of vigilance during peak sunlight hours.

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	8	very high	15 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	9	very high	15 min
14:00	6	high	25 min
15:00	3	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

The UV index exhibits consistently extreme levels throughout the year, with readings staying between 11 and 16. Notably, the highest UV index months are February (16) and March (15), while the lower end is seen in June and July (11). Visitors and residents should be particularly cautious during January through April and September through November, where the UV index remains high, leading to a burn time of just 10 minutes. It is vital to protect your skin by wearing sunscreen, protective clothing, and seeking shade during peak sun hours, regardless of the month, to mitigate the risks associated with prolonged exposure.

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
Surabaya	14	16	15	14	13	11	11	13	14	15	15	14
Bandung UVI	15	16	16	15	12	11	11	12	14	15	15	14