September in Colombo averages 28C by day and 25C at night, with 295 mm of rain over about 28 wet days. It is the 5th wettest month of the year. Early September still offers decent sightseeing windows. It remains a quiet, low-cost month with thin tourist numbers.
What to Expect
| Detail | Info |
|---|---|
| Temperature | 28C by day, 25C at night |
| Rainfall | 295 mm, about 28 wet days |
Averages for 2015 to 2024 from the Open-Meteo weather archive.
Events and Festivals
- No major events
What to Do This Season
- Gangaramaya Temple and nearby Seema Malaka on the lake
- Low-season spa and wellness deals in Colombo 3 hotels
What to Watch Out For
- Thunderstorms increase in frequency toward the end of the month
- Second half of September sees rainfall climbing noticeably
What to Wear
Breathable clothing, waterproof shoes, a packable rain jacket.
Is It Worth Visiting Now?
Maybe - rain starts building again as the inter-monsoon period approaches, but it's still workable.
More on Colombo
Flexible on dates? Compare Colombo in August and Colombo in October. The best time to visit Colombo sets all twelve months side by side. For what is open and worth it, see the things to do in Colombo. The main Colombo page covers costs and transport.
We plan trips to Colombo and the rest of Sri Lanka. Tell us your dates and we will put a route together. Our routes are on the tours page.