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When to go · Sri Lanka

Sri Lanka in September

Mixed month. East still good; Yala often closes for part of September–October.

Key facts

Verdict
Mixed
Crowds
Low
Sri Lanka
Prices
Low
Sri Lanka

Verdict

MixedVoykit month rating for Sri Lanka

East still good; Yala often closes for part of September–October.

Is another month better than September?

September is rated mixed. These months rate higher:

Weather in September

  • West and south coast · Colombo, Negombo, Bentota, Galle, Mirissarainy

    South-west monsoon May–Sep brings rough seas and red flags; October–November inter-monsoon storms are heavy in Colombo.

  • Hill country · Kandy, Nuwara Eliya, Ella, Adam's Peakfine

    Nuwara Eliya nights near 5 °C (41 °F) in winter; the Adam's Peak pilgrim season is December–May; landslide risk in heavy rain (Cyclone Ditwah, 2025).

  • Cultural Triangle · Sigiriya, Dambulla, Anuradhapura, Polonnaruwafine

    Dry zone: hot and dusty in April–May; the north-east monsoon rains fall October–January.

  • East coast · Trincomalee, Pasikudah, Arugam Baybest weather

    Opposite season to the south-west: calm seas April–September; Arugam Bay surf May–September.

  • North · Jaffna, Mannarhot

    Hot and dry most of the year; cyclones possible in November.

  • Central Province: Kandy and the mid-hills · 400–600 mfine

    Warm days, cooler nights. The southwest monsoon (Yala) soaks the hills April–July; January–March is the sunniest window.

  • Central Province: Nuwara Eliya and the highlands · 1,800–2,500 mfine

    Nights drop to around 10 °C (50 °F) or below; bring a jacket. Rain can arrive any afternoon.

  • Eastern Province: East coast (Trincomalee, Batticaloa, Arugam Bay) · the whole province coastlinebest weather

    Dry season roughly May–September, when the south and west coasts are wet. The east monsoon brings rain and rougher seas from November to March. The province is drier and hotter inland than the wet zone.

  • North Central Province: Dry zone interior · Anuradhapura, Polonnaruwa, Habaranafine

    This is Sri Lanka's dry zone. Dec–Feb is the most comfortable window; Mar–May is the hottest stretch (35 °C (95 °F)+ and humid before the rains); Jun–Sep is workable but hot; the northeast monsoon brings rain Oct–Dec.

  • North Western Province: Kurunegala and inland · Southern half of the provincerainy

    Wetter southern half, roughly 2,000 mm a year; the southwest monsoon (May–September) is the rainy stretch. Temperatures average around 20 °C (68 °F) in January rising to about 25 °C (77 °F) in March.

  • North Western Province: Puttalam and the coast · Northern half, Kalpitiya to Dutch Bayfine

    One of the driest parts of the island, under 1,100 mm in places. The dry season is the draw; the October–November rains are the weak window.

  • Northern Province: Jaffna peninsula and the Vanni · Northern Provincefine

    Dry zone. The main northeast monsoon rain falls October to December; April to August is hot and dry. The north is at its most comfortable in January to March.

  • Sabaragamuwa: Ratnapura and the lowlands · Province centre and gem countryrainy

    Rain year-round; the southwest monsoon (May–Sep) is heaviest. Mornings are usually clearer than afternoons.

  • Sabaragamuwa: Kitulgala and the hill fringe · North of the province on the Kandy roadrainy

    Rafting runs depend on water level; the season is usually December to May.

  • Sabaragamuwa: Sri Pada summit · Adam's Peak, 2,243 mno

    Pilgrimage season roughly December to May; summit nights are near freezing.

  • Southern Province: Southwest coast (Bentota to Matara) · Bentota, Hikkaduwa, Galle, Unawatuna, Mirissa, Weligamarainy

    December to April is the dry, calm-sea window; May to September brings rain and rough surf, with the heaviest falls in June and July.

  • Southern Province: Southeast dry zone (Tangalle to Tissamaharama) · Tangalle, Hambantota, Tissamaharama, Yalabest weather

    check — rain typically falls October to January and the safari window runs roughly February to September; confirm current conditions and park access before booking.

  • Uva: Highlands (Ella, Haputale, Bandarawela, Badulla) · Central highlands, roughly 1,000–2,000 mrainy

    Cool nights year-round; the south-west monsoon brings rain and mist from May to September, and the north-east monsoon adds showers in October–November.

  • Uva: Lowlands (Wellawaya, Kataragama, Udawalawe) · South-east dry zonefine

    Hotter and drier than the hills; October–November is the wettest stretch.

  • Western Province: Western Province coast and Colombo · Colombo, Negombo, Kalutara, Beruwelarainy

    South-west monsoon brings rain May–September; the drier stretch is roughly December–March. It stays hot and humid year-round.

  • Colombo29 °C (84 °F) / 25 °C (77 °F), 15 rain days
  • Ahangama29 °C (84 °F) / 25 °C (77 °F), 16 rain days
  • Ambalangoda30 °C (86 °F) / 26 °C (79 °F), 12 rain days
  • Anuradhapura32 °C (90 °F) / 24 °C (75 °F), 7 rain days
  • Arugam Bay32 °C (90 °F) / 26 °C (79 °F), 6 rain days
  • Badulla30 °C (86 °F) / 22 °C (72 °F), 11 rain days
  • Balapitiya30 °C (86 °F) / 25 °C (77 °F), 15 rain days
  • Bandarawela27 °C (81 °F) / 18 °C (64 °F), 14 rain days
  • Batticaloa32 °C (90 °F) / 25 °C (77 °F), 6 rain days
  • Bentota30 °C (86 °F) / 26 °C (79 °F), 11 rain days
  • Beragala30 °C (86 °F) / 25 °C (77 °F), 8 rain days
  • Beruwela30 °C (86 °F) / 24 °C (75 °F), 13 rain days
  • Chilaw30 °C (86 °F) / 25 °C (77 °F), 11 rain days
  • Dambulla31 °C (88 °F) / 25 °C (77 °F), 9 rain days
  • Ella24 °C (75 °F) / 16 °C (61 °F), 13 rain days
  • Gampaha30 °C (86 °F) / 25 °C (77 °F), 16 rain days
  • Hambantota33 °C (91 °F) / 26 °C (79 °F), 10 rain days
  • Haputale26 °C (79 °F) / 17 °C (63 °F), 10 rain days
  • Hikkaduwa30 °C (86 °F) / 26 °C (79 °F), 12 rain days
  • Jaffna32 °C (90 °F) / 25 °C (77 °F), 12 rain days
  • Kalpitiya31 °C (88 °F) / 26 °C (79 °F), 11 rain days
  • Kalutara30 °C (86 °F) / 27 °C (81 °F), 12 rain days
  • Kataragama33 °C (91 °F) / 24 °C (75 °F), 8 rain days
  • Kilinochchi33 °C (91 °F) / 26 °C (79 °F), 5 rain days
  • Kurunegala31 °C (88 °F) / 25 °C (77 °F), 7 rain days
  • Matale30 °C (86 °F) / 24 °C (75 °F), 10 rain days
  • Matara30 °C (86 °F) / 27 °C (81 °F), 8 rain days
  • Mirissa30 °C (86 °F) / 26 °C (79 °F), 9 rain days
  • Negombo30 °C (86 °F) / 27 °C (81 °F), 12 rain days
  • Nilaveli30 °C (86 °F) / 26 °C (79 °F), 8 rain days
  • Nuwara Eliya21 °C (70 °F) / 12 °C (54 °F), 17 rain days
  • Polonnaruwa32 °C (90 °F) / 23 °C (73 °F), 10 rain days
  • Puttalam31 °C (88 °F) / 25 °C (77 °F), 11 rain days
  • Sammanthurai32 °C (90 °F) / 25 °C (77 °F), 13 rain days
  • Sigiriya32 °C (90 °F) / 23 °C (73 °F), 8 rain days
  • Sri Jayawardenapura Kotte30 °C (86 °F) / 24 °C (75 °F), 14 rain days
  • Tangalle30 °C (86 °F) / 26 °C (79 °F), 12 rain days
  • Tissamaharama30 °C (86 °F) / 25 °C (77 °F), 6 rain days
  • Trincomalee33 °C (91 °F) / 25 °C (77 °F), 5 rain days
  • Unawatuna30 °C (86 °F) / 25 °C (77 °F), 14 rain days
  • Wadduwa30 °C (86 °F) / 25 °C (77 °F), 14 rain days
  • Weligama30 °C (86 °F) / 26 °C (79 °F), 5 rain days
  • Yapahuwa31 °C (88 °F) / 24 °C (75 °F), 9 rain days
  • Sri Jayawardenepura Kotte30 °C (86 °F) / 24 °C (75 °F), 14 rain days
  • Kandy28 °C (82 °F) / 21 °C (70 °F), 14 rain days
  • Galle29 °C (84 °F) / 25 °C (77 °F), 13 rain days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Poya days

    Monthly full moon

    Public holiday every full moon: no alcohol or meat sold, temples busy, some shops shut.

Crowds and prices

Crowds · Sri Lanka
Low
Prices · Sri Lanka
Low

Compare two months

Weather, crowds and prices for any two months in Sri Lanka, side by side.

  • Verdict

    Sep: Mixed

    Feb: Great (better)

  • Crowds

    Sep: Low

    Feb: High

  • Prices

    Sep: Low

    Feb: High

  • Festivals listed

    Sep: 1

    Feb: 2

September: East still good; Yala often closes for part of September–October.

February: The best month for most of the island; Cultural Triangle comfortable.

Sri Lanka: figures are long-term averages from this guide, not a forecast.

What to pack

  • Light, breathable clothes, a sun hat and sunscreen
  • A rain jacket or umbrella and shoes that dry fast

Build the full packing list for your trip →

Where to go in September

Rated best or good this month

  • East coast

    Best weather of the year (Trincomalee, Pasikudah, Arugam Bay)

  • Anuradhapura

    Best months: Jan–Apr, and again Jun–Sep

  • Arugam Bay

    Best months: Apr–Oct (peak July–Aug)

  • Bandarawela

    Best months: Jan–Apr, Aug–Sep

  • Batticaloa

    Best months: Apr–Sep (driest and warmest, about 32 °C (90 °F))

  • Beragala

    Best months: Jan–Apr, Jul–Sep

  • Dambulla

    Best months: Jan–Apr, Sep–Nov

  • Jaffna

    Best months: Jan–Mar (cooler and drier); Apr–Sep is workable but hot

  • Kalpitiya

    Best months: May–Sep (kitesurf), Dec–Apr (diving), Nov–Apr (dolphin/whale)

  • Kataragama

    Best months: January–April, September–November

  • Kilinochchi

    Best months: Jan–Sep

  • Kurunegala

    Best months: Dec–Mar, Jun–Sep