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UV Index in Sri Lanka

Live UV forecast for 60 cities

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UV climate of Sri Lanka: overview

Sri Lanka stretches from 5.9283° to 9.8167° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 10.4 in Ambalangoda (peak in April), while in Valvedditturai the yearly maximum is only ≈ 10.1.

UV index by month by climate zone

ZoneCitiesJFMAMJJASONDPeak
Equatorial60 9 9.6 10.2 10.3 10.1 9.9 10 10.3 10.3 10 9.4 8.9 10.3

Calculated clear-sky noon peaks at the average latitude of each zone. In the equatorial belt the UV stays high all year round, with two maxima around the equinoxes. Real values vary with clouds, altitude and ozone.

Sunniest cities in Sri Lanka (highest UV)

Ambalangoda · 10.4 in April Ambalantota · 10.4 in April Beliatta · 10.4 in April Bentota · 10.4 in April Beruwala · 10.4 in April

Cities with the mildest sun

Valvedditturai · max 10.1 Point Pedro · max 10.1 Jaffna · max 10.1 Vavuniya · max 10.2 Vakarai · max 10.2

When do you need SPF in Sri Lanka?

Using Colombo as a reference: the UV index reaches 6+ in January, February, March, April, May, June, July, August, September, October, November and December. In the sunniest zones (see table) SPF 30–50+ is needed almost year-round; in the mildest — only in late spring and summer.

FAQ: UV index in Sri Lanka

What is the highest UV index in Sri Lanka?

The calculated clear-sky maximum is ≈ 10.4 — in Ambalangoda around April. Values above this occur only near the equator and in high mountains.

Which city in Sri Lanka is the sunniest?

Ambalangoda (peak ≈ 10.4), followed by Ambalantota and Beliatta. The mildest sun is in Valvedditturai (max ≈ 10.1).

When is SPF needed in Sri Lanka?

In Colombo and similar latitudes the UV reaches 6+ in January, February, March, April, May, June, July, August, September, October, November and December: use SPF 30–50+ on sunny days. Protection is advised from UV 3.

Is UV 11+ possible in Sri Lanka?

No — the local maximum is ≈ 10.4. UV 11+ occurs only near the equator, in deserts and high mountains.