Sri Lanka in September splits in two. The Department of Meteorology counts September as the last month of the south-west monsoon, before the second inter-monsoon of October and November (Department of Meteorology). In an average September, Trincomalee, Batticaloa, Pottuvil and Anuradhapura get rain on four to six days. Colombo gets it on 15 and Galle on 17 (WMO climate normals). Average highs reach 33 to 35°C in the east and the Cultural Triangle, about 29 to 30°C on the south-west coast and 19.5°C at Nuwara Eliya. September suits a trip built round the Triangle and the east coast. The hill stations are wetter, with rain on 9 to 15 days.
Key takeaways
- The dry side in September is the east, the north and the Triangle. Pottuvil, Batticaloa, Jaffna, Anuradhapura and Trincomalee all average fewer than six wet days.
- On the south-west coast, September is wetter than July or August: Galle averages 261 mm on 17 days and Colombo 264 mm on 15.
- Binara poya, a bank and public holiday, falls on Wednesday 15 September 2027. It is the only September entry on the Central Bank’s 2027 list.
- Drought closed Blocks 1 and 2 of Yala on 14 September 2026; the reopening date given was 16 October. For a September safari, look at Udawalawe or Minneriya too, and ask about Yala before you book.
- Love Sri Lanka’s gathering page names August and September for the elephant gathering. Treat it as a chance, since a tank filled early can break it up.
Sri Lanka weather in September, station by station
Every number below is a WMO station average over the 30 years from 1991 to 2020, taken from the files in NOAA’s archive on 24 October 2026 (WMO climate normals). Rain days are days with 1 mm or more, and the rows are sorted from fewest to most.
| Weather station | Monthly rain | Wet days | Avg high / low |
|---|---|---|---|
| Pottuvil (Arugam Bay area) | 52 mm | 4.3 | 33.8°C / 24.9°C |
| Batticaloa (east coast) | 69 mm | 4.4 | 33.0°C / 25.3°C |
| Jaffna (far north) | 81 mm | 4.7 | 31.8°C / 26.5°C |
| Anuradhapura (Cultural Triangle) | 67 mm | 5.1 | 33.9°C / 24.7°C |
| Trincomalee (north-east coast) | 113 mm | 5.7 | 34.8°C / 25.1°C |
| Hambantota (south-east) | 100 mm | 8.3 | 30.5°C / 24.9°C |
| Badulla (north of Ella) | 107 mm | 8.8 | 30.7°C / 18.7°C |
| Katugastota (Kandy) | 124 mm | 12.4 | 28.9°C / 20.8°C |
| Bandarawela (near Ella) | 165 mm | 12.9 | 26.1°C / 17.3°C |
| Nuwara Eliya (high hills) | 161 mm | 14.5 | 19.5°C / 12.9°C |
| Colombo (west coast) | 264 mm | 15.2 | 30.4°C / 25.4°C |
| Galle (south coast) | 261 mm | 17.1 | 29.2°C / 25.2°C |
Jaffna’s figures cover 20 years and Pottuvil’s 28 (WMO normals for Jaffna). Sri Lanka Tourism’s season guide fits the pattern. From May to September it expects the south-west and the hill country to be wet, and points visitors to Jaffna, Trincomalee and Arugam Bay instead (Sri Lanka Tourism).
The south-west gets wetter
On the south-west coast, September is wetter than the two months before it. Galle averages 261 mm, against 162 mm in August and 173 mm in July, and its wet days climb from 14 in August to 17 (WMO normals for Galle). Colombo more than doubles, from 116 mm in August to 264 mm, and its wet days go from 10 to 15 (WMO normals for Colombo). October is wetter again at both.
The east before October
September is the last dry month for the east and the north. Trincomalee goes from 113 mm on about six days in September to 216 mm on 13 in October. Anuradhapura climbs from 67 mm to 259 mm, and Batticaloa from 69 mm to 187 mm (WMO climate normals). October opens the Met Department’s second inter-monsoon (Department of Meteorology). For the month after, see our guide to Sri Lanka in October.
Temperature in Sri Lanka in September
Trincomalee is the hottest station in the table, with average highs of 34.8°C, ahead of Anuradhapura at 33.9°C and Pottuvil at 33.8°C. Lowland nights stay warm, with average lows between 24.7°C and 26.5°C. Up in Nuwara Eliya, days average 19.5°C and nights 12.9°C, while Kandy’s Katugastota station sits between, at 28.9°C and 20.8°C (WMO climate normals). Our Sri Lanka weather by month page puts September beside the other eleven.
Is September a good time to visit Sri Lanka?
Largely yes, provided your route keeps to the dry side. The Triangle, Trincomalee and Arugam Bay are in their dry spell. The hills are mixed. Badulla, lower down and north of Ella, averages about nine wet days, but Bandarawela, closer to Ella and higher, averages 13, not far off Nuwara Eliya’s 14 or 15 (WMO climate normals).
It’s a poor month for a beach fortnight in Galle or Colombo. In our view, a first September trip should start in the Triangle, spend its beach nights in the east and finish in the hills. If your dates start earlier, our guide to Sri Lanka in August covers the month before.
Binara poya and the September 2027 dates
The Central Bank of Sri Lanka lists one holiday in September 2027: Binara Full Moon Poya Day, a bank and public holiday, on Wednesday 15 September (Central Bank of Sri Lanka). The 2026 Binara poya was on Saturday 26 September (Central Bank, 2026 list).
On a poya day nobody may sell alcohol or drink it in public, Wikivoyage notes (Wikivoyage), while Wikipedia says shops and businesses generally shut (Wikipedia). For a temple visit, GOV.UK asks for covered shoulders and legs, with hats and shoes removed (GOV.UK).
How busy is Sri Lanka in September?
Quieter than August, on the last two years’ figures. SLTDA, the tourism authority, counted 158,557 arrivals in September 2026, almost level with 158,971 in September 2025. August had 191,704 in 2026 and 198,235 in 2025 (SLTDA). SLTDA’s September 2026 report named India, China, Australia, the UK and Germany among the main markets that month (SLTDA September 2026 report).
Where to go in Sri Lanka in September
Trincomalee and the east coast, at the end of the season
Wikivoyage gives Trincomalee’s dry season as April to September, with the water at its clearest for snorkelling and diving, and says the rain and murkier water arrive with the October monsoon (Wikivoyage). For snorkelling at Pigeon Island, Love Sri Lanka picks the months from May to September; it cites the Wildlife Department’s count of about 300 reef fish species (Love Sri Lanka). Nilaveli, 16 km north of Trincomalee, is where the day trips to the island start (Wikivoyage).
Love Sri Lanka’s whale tips page gives May to October for whale and dolphin trips from Trincomalee. It puts blue whales as close as 6 to 8 nautical miles offshore from May to August (Love Sri Lanka). The site’s main whale-watching page adds that no sighting is certain, whatever the month (Love Sri Lanka whale watching).
Further south, Arugam Bay’s surf season closes after September on Love Sri Lanka’s surf map, which starts it in July (surf map). Wikivoyage stretches it to October, with smaller crowds at that end (Wikivoyage). Pottuvil, the station nearby, averages just over four wet days (WMO normals for Pottuvil). Which coast works in which month is set out in best time to surf in Sri Lanka, coast by coast.
The Cultural Triangle and the gathering’s last month
Sources disagree on the elephant gathering’s months, but September sits inside all four. Sri Lanka Tourism’s Minneriya page calls May to October a popular time (srilanka.travel). On Love Sri Lanka, the Minneriya page says May to September (Love Sri Lanka), while the gathering page gives July to October, with August and September singled out (Love Sri Lanka). A Lonely Planet safari article from January 2026 says April to October (Lonely Planet).
In September the herds may be at Kaudulla instead. Love Sri Lanka expects the bigger groups at Minneriya in August and at Kaudulla in September (Love Sri Lanka). Its gathering page favours an afternoon drive that starts at 3pm and reaches the lake at sunset (gathering page). The Wildlife Department’s 2026 magazine carries a warning from its former Director General, Sumith Pilapitiya. Since 2019, he says, water released from the Moragahakanda project has filled Minneriya early in the dry season, and once the tank is almost full in September, the herds no longer gather there (Wildlife Department magazine). The Daily FT gives a September count of 402 elephants in 2017 and just 20 by 2021. Its November 2025 report adds that the Mahaweli Authority and the Irrigation Department gave the Court of Appeal an undertaking to keep the natural sequence of water levels (Daily FT). Fees, safari hours and more on that case are in our Minneriya safari guide.
Sigiriya, Anuradhapura and Polonnaruwa are all open from 7am until 5pm, the Central Cultural Fund’s website says. Its price list, dated 14 October 2026 and read on 24 October, put a full Sigiriya ticket at USD 35, while the two older capitals cost USD 30 each (CCF tickets; CCF price list). With Anuradhapura’s highs near 34°C, climb at opening time. Our Cultural Triangle guide takes the sites one by one.
The hills around Ella and Nuwara Eliya
Bandarawela station, about 8 km south-west of Ella and 1,226 m up by the coordinates in its file, averages 165 mm on 13 days in September. Badulla, about 13 km north and down at 670 m, averages 107 mm on about nine. Nuwara Eliya averages 161 mm on 14 or 15 (WMO climate normals). Horton Plains opens from 6am to 6pm all year, though Love Sri Lanka names March to late May as its season (Love Sri Lanka). Adam’s Peak is out of season: the pilgrimage runs from December to May, the path is unlit outside it, and from May to October cloud hides the summit much of the time (Sri Pada).
The south and west coasts
Galle’s 17 wet days make September its third-wettest month by rain days (WMO normals for Galle). Surfers have one reason to come. Weligama’s small breaks, aimed at novices, often come into season at the start of September, Love Sri Lanka’s surf map says (Love Sri Lanka surf map). The same site’s Weligama beach page gives October to March instead (Love Sri Lanka). Love Sri Lanka’s whale season off Mirissa starts only in November (Love Sri Lanka).
On 21 September 2026 the Foreign Office added a warning about heavy inter-monsoon rain, flooding and landslides to its Sri Lanka travel advice. The page was still marked current on 24 October 2026 (FCDO travel advice). Apart from pointing readers to the Royal Life Saving Society, its swimming section says only: “Many beaches in Sri Lanka have dangerous surf or rip tides at certain times of the year. Get advice from your hotel or tour operator before going in the sea.” (Sri Lanka safety and security, GOV.UK)
Yala in September: the 2026 closure and the other parks
Wildlife officials shut Yala’s Blocks 1 and 2 to tourists on 14 September 2026, planning a month’s closure. Several watering points inside the park had run dry, and the animals were short of food and drink (Ada Derana, 14 September). The Daily Mirror reported the same day that the other four blocks, 3 to 6, would stay open (Daily Mirror). Earlier, on 2 September, the department had shut five campsites at Kumana and those at Gal Oya’s Hathpotha entrance because of the drought (Newswire).
On 13 October 2026, Ada Derana gave 16 October as the date both blocks would open to tourists again. Bookings for park lodges and campsites were to open on 1 November (Ada Derana, 13 October). A search on 24 October 2026 turned up no Sri Lankan report that visitors had actually gone back in. For September 2027, ask your operator about Yala a few weeks before you travel.
Two more parks have September in their season. Love Sri Lanka gives Udawalawe from May or June to October, open 6am to 6pm (Love Sri Lanka). Wilpattu’s best months are February to October, it says, with last entry at 4.30pm (Love Sri Lanka). Fees and park-by-park detail are in our Sri Lanka safari guide.
Can you take the train in September 2027?
Wikivoyage reports that Cyclone Ditwah left 70% of the rail network damaged when it struck in November and December 2025 (Wikivoyage). The Ella section, between Nanu Oya and Badulla, has taken passengers since 20 June 2026 (Sunday Times). From early October 2026, Colombo trains reached Peradeniya and Gampola again, but not Kandy, because a bridge on the way was unfinished (Sunday Times).
Sri Lanka Railways told News 1st on 1 October 2026 that it aimed to run trains between Colombo and Kandy again in January (News 1st). We found no train covering the whole Kandy to Ella run when we checked on 24 October 2026, so the route below goes by road. For the line’s progress, read our Kandy to Ella train guide.
A 10-day September route by road
Nine nights: the Triangle while the herds are about, the east coast before October, then the hills around Ella. Drive times are the OpenStreetMap route planner’s empty-road figures, rounded up.
| Nights | Getting there | Stay | Ideas |
|---|---|---|---|
| 1 and 2 | Airport, then 3.5 to 4 hours | Sigiriya | Climb the rock at opening; a 3pm jeep drive to Kaudulla or Minneriya |
| 3 to 5 | 2.5 to 3 hours | Trincomalee | Nilaveli beach, Pigeon Island, an early boat trip |
| 6 | 4 to 5 hours | Kandy | The Temple of the Tooth, then a walk round the lake |
| 7 and 8 | 2.5 to 3 hours to Nuwara Eliya, 2 to 3 more to Ella | Ella | Morning walks, and the train section that reopened in June 2026 |
| 9 | 2.5 to 3 hours | Udawalawe | An afternoon jeep safari |
| Day 10 | 4 to 4.5 hours | Home | The drive to the airport, so pick an evening flight |
That adds up to 21 to 25.5 hours of driving over nine nights. Minneriya’s gate is usually 30 to 40 minutes from Sigiriya (OpenStreetMap). If 15 September falls inside your trip, expect closed shops and no alcohol on sale that day. For why the coasts swap seasons, see our Sri Lanka monsoon season guide.
Questions about Sri Lanka in September
What is Sri Lanka’s weather like in September?
Mostly dry at Trincomalee, Batticaloa, Pottuvil, Jaffna and Anuradhapura, which average four to six wet days, and wet on the south-west coast: about 15 days in Colombo and 17 in Galle (WMO climate normals). It is the south-west monsoon’s last month, says the Met Department (Department of Meteorology).
What is the temperature in Sri Lanka in September?
On the coasts and in the Triangle, average highs run from 29.2°C in Galle to 34.8°C in Trincomalee, with lowland lows between about 25°C and 26.5°C. Nuwara Eliya averages 19.5°C by day and 12.9°C at night (WMO climate normals).
Is September a good month to visit Sri Lanka?
Yes, as long as the beach nights are in the east: Trincomalee’s dry season lasts until September, Wikivoyage says (Wikivoyage). Galle, on the south-west coast, averages 17 wet days, so a beach stay there is a gamble.
Is Yala National Park open in September?
Only in part in 2026. Blocks 1 and 2 closed for drought from 14 September (Ada Derana), while Blocks 3 to 6 were to stay open, the Daily Mirror reported (Daily Mirror). The department then set 16 October for the reopening (Ada Derana). Check the park’s status before you book.
Plan your September trip
Oura Travel plans private car-and-driver tours from its base in Weligama. Send us your September dates and we’ll draft a plan that keeps you on the dry side, with time for the hills and the herds.
Station averages, holiday dates, arrivals, ticket prices, park news, rail reports and drive times were read on 24 October 2026. A 30-year average is not a forecast, and park and rail rules change at short notice, so check again close to your trip.
