SeasonMapBentota weather in September
Sri Lanka
September in Bentota: sweltering, soaked, with clean air — fine if you can take 28 rainy days.
#9 of 12 months in Bentota · #931 of 1383 destinations to visit in September · comfort 70/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Bentota in September
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Bentota climate normals — September
| Daytime high | 28°C / 83°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 34°C / 93°F | |
| Sea temperature | 28°C / 83°F | ♨️ bath-warm |
| Rainfall | 252 mm / 9.9 in | ⛈ soaked |
| Rainy days | 28 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 12.2 h | |
| Wind | 15 km/h / 10 mph | |
| Air quality (US AQI) | 49 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Bentota in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyAugust break in Sri Lanka, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Bentota's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherBentota's weather peaks January–March, best around February.
Best weatherFair weatherToughest weather
What's on in Bentota in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Poya days
1 Jan – 31 DecClosuresEvery full moon is a civil holiday and the sale of alcohol is prohibited islandwide, hotel bars included. There are thirteen or fourteen a year, so one will land on most trips. Source ↗
- Season
Off-season on the strip
15 May – 15 Sep · usuallyOff-season shutdownClosuresThe sea gets rough and brown, the jet-ski and banana-boat outfits mostly stop, and a good share of the beach restaurants close for repairs. Rooms are half price and the river trips still run.
- Season
Wet season
MonsoonRisk28 rainy days and about 252 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Bentota — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Bentota?
Bentota in September — FAQ
- Is September a good time to visit Bentota?
- September in Bentota: sweltering, soaked, with clean air — fine if you can take 28 rainy days. It ranks #9 of 12 months for Bentota on SeasonMap's comfort score (70/100).
- What is the weather like in Bentota in September?
- In September, Bentota averages a daily high of 28.4°C and a low of 24.9°C, with about 252.3 mm of rain over roughly 28 rainy days.
- What is the air quality in Bentota in September?
- Bentota has a mean US Air Quality Index of about 49 in September.
Other months in Bentota
Compare Bentota in September
Warmer or cooler than Bentota in September
Similar destinations in South Asia — September
Within 300 km: Sigiriya's The Gathering at Minneriya around 15 Jul – 30 Sep, and Trincomalee's Blue and sperm whale season around 1 May – 15 Oct.