May in Polonnaruwa averages 34C by day and 26C at night, with 143 mm of rain over about 15 wet days. It is the 4th wettest month of the year. Lamps and lanterns around Gal Vihara at night draw pilgrims as well as photographers. Daytime sightseeing needs to start early.
What to Expect
| Detail | Info |
|---|---|
| Temperature | 34C by day, 26C at night |
| Rainfall | 143 mm, about 15 wet days |
Averages for 2015 to 2024 from the Open-Meteo weather archive.
Events and Festivals
- Vesak Poya (full moon, major Buddhist festival - lanterns and oil lamps at Gal Vihara and the Vatadage)
What to Do This Season
- Vesak evening illuminations at the ancient shrines
- Dawn visits to beat the heat before 8am
- Quieter midweek access outside the Vesak weekend
What to Watch Out For
- Temperatures regularly exceed 33°C by afternoon
- Alcohol sales restricted during Vesak Poya days nationwide
What to Wear
Minimal, breathable cotton; avoid dark colours that absorb heat.
Is It Worth Visiting Now?
Yes, with caution - Vesak celebrations light up the temples, but daytime heat is serious.
More on Polonnaruwa
Flexible on dates? Compare Polonnaruwa in April and Polonnaruwa in June. The best time to visit Polonnaruwa sets all twelve months side by side. For what is open and worth it, see the things to do in Polonnaruwa. The main Polonnaruwa page covers costs and transport.
We plan trips to Polonnaruwa and the rest of Sri Lanka. Tell us your dates and we will put a route together. Our routes are on the tours page.