Denpasar (Bali) weather in September
September in Denpasar: sweltering, rainy, with clean air — fine if you can take 35°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#4 of 12 months in Denpasar · #433 of 1413 destinations to visit in September · comfort 86/100 (tier A)
- Days
- 30°C
- Nights
- 24°C
- Wet days
- 16
- Sun
- 11.1 h
- Humidity
- 87%
- Daylight
- 12 h

What September is like in Denpasar
Still dry and clear, with the crowds falling away after the first week. The month residents suggest.
shoulder
confidence: high
Traveller notes on Denpasar in September
Bali-forum threads on September call it a genuinely good month - lower-rain by local standards, hot and sunny through the day, with any showers usually holding off until evening rather than interrupting daytime plans. Posters are quick to add the island runs on microclimates: it can be pouring in one spot and cloudless a mile down the road, inland areas running wetter than the coast as a rule. The record complicates the low-rain read more than the forum chat suggests, though: 30.1C days feeling like a sticky 35C, 23.9C nights, 90mm across a notably high 15.5 days, 87 percent humidity, 11.1 hours of sun and a 26.6C sea - genuinely September-in-the-tropics wet, just concentrated enough in short bursts that it rarely ruins a day out.
Other months in Denpasar
Regulars are specific this falls within the dry season here, May through September, mornings typically clear or briefly overcast until around 8:30 before turning sunny with light sea breezes along the coast, any downpour usually arriving mid-afternoon and clearing again by evening. Our row backs that hot, genuinely wet read, 30.7C reading as a scorching 37C, over 25.2C nights feeling 30C, with a substantial 114.6mm of rain across 18.3 days and humidity at 86 percent. Regulars are consistent this counts among the best months to visit by local consensus, mostly sunny days the norm even with a quick afternoon shower a real, near-daily possibility. The sea sits at a bath-warm 29C. The record: 10.6 hours of sun, a 12.8 kph wind and AQI 48.
Bali-forum threads on January weather are consistent that it's peak wet season island-wide, with outcomes swinging from an unbroken run of rainy days to the more typical pattern of on-and-off showers with real sunny stretches between. Regulars are specific that rain here doesn't run cold - a downpour arrives, the sun comes back out shortly after, and the heat never really lets up regardless. Microclimates matter for where to base a stay: the north runs drier than central and southern Bali, and the driest pocket in January is the east coast around Amed. One recurring downside of the wet season - ocean currents wash rubbish onto surf beaches like Kuta, Legian, Seminyak and Canggu, worth checking before planning beach time in the south. The record: a sticky 31C by day feeling like 38C, 25C nights, a notably high 366mm across 28.5 days, 87 percent humidity, a 28.8C sea and 9 hours of sun - the wettest entry on the island's whole calendar.
June is one of the months Bali regulars recommend without argument: the dry season, clear skies, lower humidity, days around 27 to 30C, fewer visitors than the peak and calm enough seas that the fast boats rarely get cancelled. The qualification they attach matters more here than almost anywhere. Bali is a stack of microclimates - it can pour in one place and be clear a few hundred metres away, Ubud and the centre are much wetter than the coast, and the east is the driest side. Their own line is that it rains somewhere on Bali 365 days a year, and that the rain is usually short. Our row for Denpasar says 80.4mm across 16.6 days, which is that pattern rather than a wet month. The record: 29.8C days that feel like 35C, 24.5C nights, humidity 85 percent and a 28.2C sea.
July is Bali's dry season and the forum's favourite month for one reason above the others: it is the least humid of the twelve. Our row agrees and shows how relative that is - 84.5 percent, the year's low, still thoroughly tropical, and a 29C day that feels like 33C. The rain reads oddly too, 14.7 precipitation days carrying only 71.9mm, which is the pattern regulars describe: overcast mornings whose cloud moves out to sea or north to the mountains rather than settled wet weather. Microclimates matter more than the month here - Ubud can be having rain while Kuta and Sanur are perfect, and Sanur's breeze is the thing people name. The other July variable is wind, with strong offshore days at times. The record: 24.1C nights, 10.8 hours of sun, a 27.8C sea and a 16 kph breeze.
Add your own note from Denpasar's card on the map.
Denpasar climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Denpasar 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.
Busybetween the peaks, Dry season, school holidays in 3 of the markets that fill it
Peak crowdsBusyShoulder seasonQuiet
Best months for Denpasar'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 weatherDenpasar's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Denpasar in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Bali tourist levy
1 Jan – 31 DecEvery foreign visitor pays a one-off provincial levy, ideally online before arrival; there are desks at the airport for those who did not, and a QR receipt is checked at some sites. Source ↗
- Season
Dry season
1 May – 30 Sep · usuallyCrowdedThe trade wind arrives with lower humidity, reliable surf on the west-facing coast and every visitor at once. May and September are the same weather without the traffic.
- Season
West coast surf season
1 May – 30 Sep · usuallyOffshore winds on the Bukit and the west-facing breaks give the most reliable surf of the year. In the wet season it reverses and the east coast takes over.
- Season
Kite season
15 Jun – 15 Sep · usuallyDry seasonThe dry-season wind fills the sky south of the city with village-built bebean and janggan kites the size of a car, flown by teams with gamelan players on the ground. Competitions run through July and August.
Nearby, and something's on
Within 300 km of Denpasar — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Denpasar?
Denpasar in September — FAQ
- Is September a good time to visit Denpasar?
- September in Denpasar: sweltering, rainy, with clean air — fine if you can take 35°C afternoons. It ranks #4 of 12 months for Denpasar on SeasonMap's comfort score (86/100).
- What is the weather like in Denpasar in September?
- In September, Denpasar averages a daily high of 30.1°C and a low of 23.9°C, with about 89.6 mm of rain over roughly 15.5 rainy days.
- What is the air quality in Denpasar in September?
- Denpasar has a mean US Air Quality Index of about 48 in September.
Within 300 km: Nusa Penida's Mola season around 1 Jul – 31 Oct, and Gili Trawangan's Turtle nesting around 1 May – 31 Oct.