UV Index in Unawatuna, Sri Lanka

Last updated: May 3, 2025

In Unawatuna, Sri Lanka, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding the UV levels can help prevent sunburn and long-term skin damage, making it essential for both locals and visitors alike. With a tropical climate and high UV exposure—peaking at a remarkable 14 during midday—Unawatuna presents unique challenges when it comes to sun safety. By staying informed about the UV Index, you can enjoy the beautiful beaches and vibrant atmosphere while minimizing your risk of skin-related issues. Remember to wear sunscreen, seek shade, and plan your outdoor activities accordingly!

Hourly UV Index in Unawatuna

At dawn, the UV Index begins modestly at 2 by 7:00 AM, but as the sun rises, so does the intensity of ultraviolet rays. By 8:00 AM, the index jumps to 5, marking the start of heightened UV exposure. The peak occurs at 11:00 AM and 12:00 PM, where it reaches a staggering 14, indicating a critical time for sun protection. After noon, the index begins to decline, dropping to 12 by 1:00 PM and falling further to 8 at 2:00 PM. As the afternoon progresses, the UV Index continues its descent, landing at 4 by 3:00 PM and further decreasing to 2 by 4:00 PM. Finally, the day winds down with minimal UV exposure, resting at 1 by 5:00 PM and dropping to 0 after 6:00 PM, highlighting the need for vigilance during those peak hours when UV radiation is most potent.

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	2	low	45 min
08:00	5	moderate	30 min
09:00	8	very high	15 min
10:00	12	extreme	10 min
11:00	14	extreme	10 min
12:00	14	extreme	10 min
13:00	12	extreme	10 min
14:00	8	very high	15 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 Unawatuna

The UV Index shows that the region experiences extreme sun exposure year-round, with consistently high values ranging from 11 to 15. The high-risk months for sun exposure are from January to April, where the UV Index peaks at 15 in both March and April, highlighting a critical period for skin protection. Visitors and residents should take precautions by applying sunscreen, wearing protective clothing, and seeking shade, especially during these months. Even in the latter months of the year, such as October and November, the UV Index remains elevated, indicating that sun safety is a year-round concern. Remember, burn times are roughly 10 minutes across all months, emphasizing the importance of vigilance against UV damage at all times.

Monthly Maximum UV Index for Unawatuna, Sri Lanka

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

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

Unawatuna's solar exposure compared to other cities in Sri Lanka. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Jaffna UVI	11	13	14	15	13	12	13	13	14	12	11	10
Moratuwa UVI	11	13	14	15	14	12	13	14	14	13	11	10
Maharagama UVI	11	13	14	15	14	12	13	14	14	13	11	10
Dehiwala-Mount Lavinia UVI	12	13	14	15	14	12	13	14	14	13	11	10
Colombo UVI	12	14	14	15	14	13	13	13	14	13	11	10
Unawatuna	13	14	15	15	14	12	13	14	14	13	11	11