September in Mirissa averages 29C by day and 25C at night, with 240 mm of rain over about 27 wet days. It is the 4th wettest month of the year. Beach activities slowly return but weather remains unpredictable day-to-day.
What to Expect
| Detail | Info |
|---|---|
| Temperature | 29C by day, 25C at night |
| Rainfall | 240 mm, about 27 wet days |
Averages for 2015 to 2024 from the Open-Meteo weather archive.
Events and Festivals
- No major events
- Local school holidays
What to Do This Season
- Fewer crowds
- Better snorkeling conditions
- Restaurants reopen
What to Watch Out For
- Weather remains unpredictable
- Some tour operators still closed
- Afternoon showers likely
What to Wear
Versatile layers, waterproof accessories
Is It Worth Visiting Now?
Maybe - transitional month with improving but unpredictable weather
More on Mirissa
Flexible on dates? Compare Mirissa in August and Mirissa in October. The best time to visit Mirissa sets all twelve months side by side. For what is open and worth it, see the things to do in Mirissa. The main Mirissa page covers costs and transport.
We plan trips to Mirissa and the rest of Sri Lanka. Tell us your dates and we will put a route together. Our routes are on the tours page.