UV Index
UV Index
Today's UV index in Mirissa, Sri Lanka 
will be up to 11.3, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-01
UV index at 11.3 in Mirissa means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Mirissa is quite high most of the year, often ranging between 8 and 12. This means the sun's rays are very strong, especially around midday.
Mirissa experiences a tropical climate with a wet season from May to September and a dry season from December to March. Temperatures stay warm year-round, usually between 27°C and 32°C.
Compared to other parts of Sri Lanka, Mirissa is warmer and sunnier during the dry season. It is more humid and rainy than coastal areas in southern India but less rainy than Sri Lanka's central hill regions.
See the UV index hour by hour for Mirissa, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.