- Book online with TUI & save up to 7% on holidays
- FREE child places available for select holidays
- Pay £0 deposits with direct debit & spread the cost
Sri Lanka weather in September 2025
Expect 86°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Sri Lanka in September. Check more long-term weather averages for Sri Lanka in September before you book your next holiday to Sri Lanka in 2025/2026.
- 86°F max day temperature
86 - 6 hours of sunshine per day
- 14 days with some rainfall
14 - 77°F min night temperature
77 - 12 hours of daylight per day
12 - High heat & humidity
H - 9.3 inches of monthly rainfall
9.3 - 11+ (Extreme) UV index
11 - 82°F sea temperature
82
More about Sri Lanka
- Overview
- Best time to visit
- Weather by month
- 5-day weather forecast
- Destinations
- Travel advice
- Deals & discounts
Sri Lanka by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Sri Lanka
TUI deal finder
The September weather guide for Sri Lanka (Colombo) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Sri Lanka destinations
Below are average maximum temperatures at popular countries, regions and places in Sri Lanka in September. Select a holiday destination to see more weather parameters.
All Sri Lanka destinations
- Ahungalla
- Anuradhapura
- Arugam Bay
- Aturuwella
- Bentota
- Beruwela
- Colombo
- Galle
- Hikkaduwa
- Jaffna
- Kalutara
- Kandalama
- Kandy
- Kurunegala
- Matara
- Mirissa Beach
- Mount Lavinia-Dehiwala
- Negombo
- Nuwara Eliya
- Polonnaruwa
- Sigiriya
- Trincomalee
- Unawatuna
- Wadduwa
- Waikkal
- Yala
Metric (°C) | Imperial (°F)
More about Sri Lanka
How hot is it in Sri Lanka in September?
Daytime temperatures usually reach 86°F in Colombo, Sri Lanka in September with high heat and humidity, falling to 77°F at night.
How sunny is it in Sri Lanka in September?
There are normally 6 hours of bright sunshine each day in Colombo, Sri Lanka in September - that's 50% of daylight hours.
How warm is the sea around Sri Lanka in September?
The average sea temperature around Colombo, Sri Lanka in September is 82°F.
Does it rain in Sri Lanka in September?
There are usually 14 days with some rain in Colombo, Sri Lanka in September and the average monthly rainfall is 9.3 inches.
Sri Lanka September sunrise & sunset times
Browse the sunrise and sunset times for Sri Lanka in September 2025. Select a month to view Sri Lanka sunrise and sunset times for the next 12 months. The Sri Lanka sunrise and sunset times shown below are for Colombo.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 06:03 | 18:18 |
| Monday, 15th September 2025 | 06:01 | 18:10 |
| Tuesday, 30th September 2025 | 05:59 | 18:02 |
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- Black Friday sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport