Bali in September is the underrated month. Highs 29°C. Lows 22°C. Sea 26°C. 3 rain days, barely a sprinkle. Humidity 72%. Crowds: easing off.
Crowds drop sharply after the first week as European school terms restart. Weather remains identical to July-August (29C, 3 rain days, low humidity). Cave hotels in Ubud open up. Surf still firing on the east coast. Here’s what you actually need to know: weather, surf, festivals, packing, and an honest take. For the year-round overview see the full Bali travel guide.
Weather in Bali in September
Bali sits 8 degrees south of the equator, so temperature variation across the year is small (24-31°C range). What changes is the rain. In September:
- Average daytime high: 29°C
- Average overnight low: 22°C
- Sea temperature: 26°C (warm year-round)
- Rain days: 3 per month
- Daily sunshine: 10 hours
- Humidity: 72%
- Sunrise / sunset: 6:15am / 6:25pm
The rain pattern matters more than the rain count. Even in the wettest months, mornings tend to be sunny, storms typically build mid-afternoon and pass within an hour or two. Plan beach time before 1pm; plan spa/yoga/cooking class for late afternoon.
Surf & Beach in September
The surf swell direction flips with the seasons. east coast still working works in September. Conditions are mixed — check the daily forecast on Magicseaweed before committing to a coast for the day. Sea temperature of 26°C means a board shorts or rash-guard session — wetsuits are never required.
Festivals & Events in September
Ubud Food Festival (mid-September). The Balinese religious calendar runs on a 210-day cycle, so Hindu ceremonies shift through the months year-on-year. Local village (banjar) ceremonies happen weekly somewhere on the island regardless of the month — ask your hotel staff what’s happening that week.
Crowds & Pricing
The Ubud Writers Festival in late October was worth booking around, small enough to actually meet authors.
Crowd level in September is busy. What that actually looks like:
- Hotels approaching full on weekends; book 2-3 weeks ahead
- Top restaurants need 1-2 days reservation
- Scooter rentals 90-110k IDR/day
- Beach clubs busy most afternoons
What to Pack for Bali in September
- High-SPF reef-safe sunscreen — equatorial sun is unforgiving
- Wide-brim hat or cap
- Quick-dry sportswear for surf/yoga/hiking
- One light long-sleeve for sunburn coverage
- Sarong or modest cover-up for temple visits
- Insect repellent — less critical than wet season but still useful
- Refillable water bottle with filter (most cafes offer free refills)
Best Things to Do in Bali in September
- Surf the right coast — east coast still working in September. Lessons at Batu Bolong (Canggu) for beginners.
- Sunrise hike up Mount Batur — 2-hour climb, breakfast at the rim, 400-500k IDR with guide.
- Ubud rice terraces. Tegallalang most photographed, Jatiluwih largest and quietest.
- Nusa Penida day trip. Kelingking Beach viewpoint, Angel Billabong, Broken Beach. Fast boat from Sanur.
- Uluwatu Temple kecak fire dance at sunset, the most dramatic cultural performance on the island.
- Balinese cooking class. Paon Bali (Ubud) or Bumbu Bali (Tanjung Benoa) are the established benchmarks.
Pros & Cons of Bali in September
What works
- Dry-season weather: ~3-4 hours of daily storms a year, sea calm, snorkelling visibility excellent
- Comfortable humidity, sub-30C daytime, clear nights
- Bali’s core appeal (warm sea, fresh food, low costs, deep Hindu culture) is constant year-round
- Bali’s core appeal (warm sea, fresh food, low costs, deep Hindu culture) is constant year-round
The trade-offs
- Inland Ubud and the Sidemen highlands much drier — rice terraces less vivid than during shoulder months
- Traffic in south Bali is heavy regardless of season
- Traffic in south Bali is heavy regardless of season
Who Should Visit (and Who Should Skip)
September is right for you if…
- Beach holidayers and divers who need reliable dry-season conditions
- Anyone constrained to september dates
- Anyone constrained to september dates
Maybe skip September if…
- Travellers with non-negotiable expectations of perfect Bali postcard weather
- Travellers with non-negotiable expectations of perfect Bali postcard weather
Photography Conditions in September
Sunrise sits around 6:15am. Plan for the morning balloon-or-terrace shot first, then move into the valleys for the second hour of post-sunrise light.
- Crystalline sea, dust-free distances, predictable golden hour starting around 5:30pm.
- Drone conditions consistently flyable. South coast cliffs (Uluwatu, Nyang Nyang) light up at 5:30pm.
September vs Adjacent Months
If your dates are flexible by a week or two, here’s how September stacks up against August and October on the metrics that matter:
| Month | Temp range | Rain days | Crowds | Season notes |
|---|---|---|---|---|
| August | 22 to 29°C | 3 rain days | peak | peak season |
| September | 22 to 29°C | 3 rain days | busy | shoulder value |
| October | 23 to 30°C | 6 rain days | busy | transitional, best value |
Read the dedicated guides: Bali in August · Bali in October.
Verdict: Is September a Good Time to Visit Bali?
Best value month of the year. Same weather as peak season, 30-40% lower prices, half the crowds.
If you want alternatives: the three best months to visit Bali, balancing weather, prices and crowd levels, are November, March, and February. For the year-round comparison see the main Bali travel guide.
Experiences & Activities
Book Tours & Day Trips for Bali in September
Browse Mount Batur sunrise treks, Nusa Penida day trips, Ubud rice-terrace walks, temple tours and snorkelling at Amed — bookable online with free cancellation on most.
Browse Bali experiences →Frequently Asked Questions
What is the weather like in Bali in September?
Bali in September averages 29°C daytime and 22°C overnight, with sea temperature of 26°C, about 3 rain days and 10 hours of daily sunshine. Humidity is around 72%. Rain typically falls as short afternoon storms.
Is Bali in September part of the wet or dry season?
September sits in the dry season. Rain is rare and short-lived.
Is Bali crowded in September?
Crowd level in September is busy. Top restaurants and villas need a few days’ notice; some weekends busy.
Where is the surf best in Bali in September?
In September surf is concentrated on the east coast still working. Sea temperature is 26°C so a rash guard or board shorts are sufficient — no wetsuit needed year-round.
Are there festivals in Bali in September?
Ubud Food Festival (mid-September). Village banjar ceremonies happen weekly across the island year-round.